diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
index 1aded6c0a3..458b0a6ee0 100644
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -88,6 +88,7 @@ phutil_register_library_map(array(
     'ConduitAPI_differential_parsecommitmessage_Method' => 'applications/conduit/method/differential/parsecommitmessage',
     'ConduitAPI_differential_setdiffproperty_Method' => 'applications/conduit/method/differential/setdiffproperty',
     'ConduitAPI_differential_updaterevision_Method' => 'applications/conduit/method/differential/updaterevision',
+    'ConduitAPI_differential_updatetaskrevisionassoc_Method' => 'applications/conduit/method/differential/updatetaskrevisionassoc',
     'ConduitAPI_diffusion_getcommits_Method' => 'applications/conduit/method/diffusion/getcommits',
     'ConduitAPI_file_upload_Method' => 'applications/conduit/method/file/upload',
     'ConduitAPI_path_getowners_Method' => 'applications/conduit/method/path/getowners',
@@ -540,6 +541,7 @@ phutil_register_library_map(array(
     'ConduitAPI_differential_parsecommitmessage_Method' => 'ConduitAPIMethod',
     'ConduitAPI_differential_setdiffproperty_Method' => 'ConduitAPIMethod',
     'ConduitAPI_differential_updaterevision_Method' => 'ConduitAPIMethod',
+    'ConduitAPI_differential_updatetaskrevisionassoc_Method' => 'ConduitAPIMethod',
     'ConduitAPI_diffusion_getcommits_Method' => 'ConduitAPIMethod',
     'ConduitAPI_file_upload_Method' => 'ConduitAPIMethod',
     'ConduitAPI_path_getowners_Method' => 'ConduitAPIMethod',
diff --git a/src/applications/conduit/controller/console/PhabricatorConduitConsoleController.php b/src/applications/conduit/controller/console/PhabricatorConduitConsoleController.php
index 4bee4284c5..4ffb6087fb 100644
--- a/src/applications/conduit/controller/console/PhabricatorConduitConsoleController.php
+++ b/src/applications/conduit/controller/console/PhabricatorConduitConsoleController.php
@@ -83,7 +83,7 @@ class PhabricatorConduitConsoleController
         id(new AphrontFormTextControl())
           ->setLabel($param)
           ->setName("params[{$param}]")
-          ->setCaption($desc));
+          ->setCaption(phutil_escape_html($desc)));
     }
 
     $form
diff --git a/src/applications/conduit/method/differential/find/ConduitAPI_differential_find_Method.php b/src/applications/conduit/method/differential/find/ConduitAPI_differential_find_Method.php
index fc4b986f1e..1c00674718 100644
--- a/src/applications/conduit/method/differential/find/ConduitAPI_differential_find_Method.php
+++ b/src/applications/conduit/method/differential/find/ConduitAPI_differential_find_Method.php
@@ -34,7 +34,7 @@ class ConduitAPI_differential_find_Method extends ConduitAPIMethod {
 
     return array(
       'query' => 'required enum<'.$types.'>',
-      'guids' => 'required nonempty list<phid>',
+      'guids' => 'required nonempty list<guids>',
     );
   }
 
@@ -49,14 +49,18 @@ class ConduitAPI_differential_find_Method extends ConduitAPIMethod {
 
   protected function execute(ConduitAPIRequest $request) {
     $query = $request->getValue('query');
-    $phids = $request->getValue('guids');
+    $guids = $request->getValue('guids');
+
+    $results = array();
+    if (!$guids) {
+      return $results;
+    }
 
     $revisions = id(new DifferentialRevisionListData(
       $query,
-      (array)$phids))
+      (array)$guids))
       ->loadRevisions();
 
-    $results = array();
     foreach ($revisions as $revision) {
       $diff = $revision->loadActiveDiff();
       if (!$diff) {
@@ -64,6 +68,7 @@ class ConduitAPI_differential_find_Method extends ConduitAPIMethod {
       }
       $results[] = array(
         'id'          => $revision->getID(),
+        'phid'        => $revision->getPHID(),
         'name'        => $revision->getTitle(),
         'statusName'  => DifferentialRevisionStatus::getNameForRevisionStatus(
           $revision->getStatus()),
diff --git a/src/applications/conduit/method/differential/updatetaskrevisionassoc/ConduitAPI_differential_updatetaskrevisionassoc_Method.php b/src/applications/conduit/method/differential/updatetaskrevisionassoc/ConduitAPI_differential_updatetaskrevisionassoc_Method.php
new file mode 100644
index 0000000000..45a3a6829b
--- /dev/null
+++ b/src/applications/conduit/method/differential/updatetaskrevisionassoc/ConduitAPI_differential_updatetaskrevisionassoc_Method.php
@@ -0,0 +1,71 @@
+<?php
+
+/*
+ * Copyright 2011 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+class ConduitAPI_differential_updatetaskrevisionassoc_Method
+  extends ConduitAPIMethod {
+  public function getMethodDescription() {
+    return "Given a task together with its original and new associated ".
+      "revisions, update the revisions for their attached_tasks.";
+  }
+
+  public function defineParamTypes() {
+    return array(
+      'task_phid' => 'required nonempty string',
+      'orig_rev_phids' => 'required list<string>',
+      'new_rev_phids' => 'required list<string>',
+    );
+  }
+
+  public function defineReturnType() {
+    return 'void';
+  }
+
+  public function defineErrorTypes() {
+    return array(
+      'ERR_NO_TASKATTACHER_DEFINED' => 'No task attacher defined.',
+    );
+  }
+
+  protected function execute(ConduitAPIRequest $request) {
+    $task_phid = $request->getValue('task_phid');
+    $orig_rev_phids = $request->getValue('orig_rev_phids');
+    if (empty($orig_rev_phids)) {
+      $orig_rev_phids = array();
+    }
+
+    $new_rev_phids = $request->getValue('new_rev_phids');
+    if (empty($new_rev_phids)) {
+      $new_rev_phids = array();
+    }
+
+    $task_class = PhabricatorEnv::getEnvConfig(
+      'differential.attach-task-class');
+    if (!$task_class) {
+      throw new ConduitException('ERR_NO_TASKATTACHER_DEFINED');
+    }
+
+    PhutilSymbolLoader::loadClass($task_class);
+    $task_attacher = newv($task_class, array());
+    $task_attacher->updateTaskRevisionAssoc(
+      $task_phid,
+      $orig_rev_phids,
+      $new_rev_phids);
+  }
+
+}
+
diff --git a/src/applications/conduit/method/differential/updatetaskrevisionassoc/__init__.php b/src/applications/conduit/method/differential/updatetaskrevisionassoc/__init__.php
new file mode 100644
index 0000000000..0ad02cea4f
--- /dev/null
+++ b/src/applications/conduit/method/differential/updatetaskrevisionassoc/__init__.php
@@ -0,0 +1,17 @@
+<?php
+/**
+ * This file is automatically generated. Lint this module to rebuild it.
+ * @generated
+ */
+
+
+
+phutil_require_module('phabricator', 'applications/conduit/method/base');
+phutil_require_module('phabricator', 'applications/conduit/protocol/exception');
+phutil_require_module('phabricator', 'infrastructure/env');
+
+phutil_require_module('phutil', 'symbols');
+phutil_require_module('phutil', 'utils');
+
+
+phutil_require_source('ConduitAPI_differential_updatetaskrevisionassoc_Method.php');
diff --git a/src/applications/differential/controller/revisionview/DifferentialRevisionViewController.php b/src/applications/differential/controller/revisionview/DifferentialRevisionViewController.php
index 835250f9f8..316a9b340b 100644
--- a/src/applications/differential/controller/revisionview/DifferentialRevisionViewController.php
+++ b/src/applications/differential/controller/revisionview/DifferentialRevisionViewController.php
@@ -157,6 +157,11 @@ class DifferentialRevisionViewController extends DifferentialController {
         $custom_renderer->generateActionLinks($revision, $target));
     }
 
+    $whitespace = $request->getStr(
+      'whitespace',
+      DifferentialChangesetParser::WHITESPACE_IGNORE_TRAILING
+    );
+
     $revision_detail->setActions($actions);
 
     $revision_detail->setUser($user);
@@ -169,24 +174,26 @@ class DifferentialRevisionViewController extends DifferentialController {
     $comment_view->setUser($user);
     $comment_view->setTargetDiff($target);
 
+    $changeset_view = new DifferentialChangesetListView();
+    $changeset_view->setChangesets($visible_changesets);
+    $changeset_view->setEditable(true);
+    $changeset_view->setRevision($revision);
+    $changeset_view->setVsMap($vs_map);
+    $changeset_view->setWhitespace($whitespace);
+
     $diff_history = new DifferentialRevisionUpdateHistoryView();
     $diff_history->setDiffs($diffs);
     $diff_history->setSelectedVersusDiffID($diff_vs);
     $diff_history->setSelectedDiffID($target->getID());
-    $diff_history->setSelectedWhitespace($request->getStr('whitespace'));
+    $diff_history->setSelectedWhitespace($whitespace);
 
     $toc_view = new DifferentialDiffTableOfContentsView();
     $toc_view->setChangesets($changesets);
     $toc_view->setStandaloneViewLink(empty($visible_changesets));
     $toc_view->setVsMap($vs_map);
     $toc_view->setRevisionID($revision->getID());
+    $toc_view->setWhitespace($whitespace);
 
-    $changeset_view = new DifferentialChangesetListView();
-    $changeset_view->setChangesets($visible_changesets);
-    $changeset_view->setEditable(true);
-    $changeset_view->setRevision($revision);
-    $changeset_view->setVsMap($vs_map);
-    $changeset_view->setWhitespace($request->getStr('whitespace'));
 
     $draft = id(new PhabricatorDraft())->loadOneWhere(
       'authorPHID = %s AND draftKey = %s',
@@ -604,273 +611,3 @@ class DifferentialRevisionViewController extends DifferentialController {
         ->replace();
   }
 }
-/*
-
-
-  protected function getSandcastleURI(Diff $diff) {
-    $uri = $this->getDiffProperty($diff, 'facebook:sandcastle_uri');
-    if (!$uri) {
-      $uri = $diff->getSandboxURL();
-    }
-    return $uri;
-  }
-
-  protected function getDiffProperty(Diff $diff, $property, $default = null) {
-    $diff_id = $diff->getID();
-    if (empty($this->diffProperties[$diff_id])) {
-      $props = id(new DifferentialDiffProperty())
-        ->loadAllWhere('diffID = %s', $diff_id);
-      $dict = array_pull($props, 'getData', 'getName');
-      $this->diffProperties[$diff_id] = $dict;
-    }
-    return idx($this->diffProperties[$diff_id], $property, $default);
-  }
-
-    $diff_table->appendChild(
-      <tr>
-        <td colspan="8" class="diff-differ-submit">
-          <label>Whitespace Changes:</label>
-          {id(<select name="whitespace" />)->setOptions(
-            array(
-              'ignore-all'      => 'Ignore All',
-              'ignore-trailing' => 'Ignore Trailing',
-              'show-all'        => 'Show All',
-            ), $request->getStr('whitespace'))}{' '}
-          <button type="submit">Show Diff</button>
-        </td>
-      </tr>);
-
-    $load_ids = array_filter(array($old, $diff->getID()));
-
-    $viewer_id = $this->getRequest()->getViewerContext()->getUserID();
-
-    $raw_objects = queryfx_all(
-      smc_get_db('cdb.differential', 'r'),
-      'SELECT * FROM changeset WHERE changeset.diffID IN (%Ld)',
-      $load_ids);
-
-    $raw_objects = array_group($raw_objects, 'diffID');
-    $objects = $raw_objects[$diff->getID()];
-
-    if (!$objects) {
-      $changesets = array();
-    } else {
-      $changesets = id(new DifferentialChangeset())->loadAllFromArray($objects);
-    }
-
-
-
-    $feedback = id(new DifferentialFeedback())->loadAllWithRevision($revision);
-    $feedback = array_merge($implied_feedback, $feedback);
-
-    $inline_comments = $this->loadInlineComments($feedback, $changesets);
-
-    $diff_map = array();
-    $diffs = array_psort($diffs, 'getID');
-    foreach ($diffs as $diff) {
-      $diff_map[$diff->getID()] = count($diff_map) + 1;
-    }
-    $visible_changesets = array_fill_keys($visible_changesets, true);
-    $hidden_changesets = array();
-    foreach ($changesets as $changeset) {
-      $id = $changeset->getID();
-      if (isset($visible_changesets[$id])) {
-        continue;
-      }
-      $hidden_changesets[$id] = $diff_map[$changeset->getDiffID()];
-    }
-
-
-    $engine = new RemarkupEngine();
-    $engine->enableFeature(RemarkupEngine::FEATURE_GUESS_IMAGES);
-    $engine->enableFeature(RemarkupEngine::FEATURE_YOUTUBE);
-    $engine->setCurrentSandcastle($this->getSandcastleURI($target_diff));
-
-    $syntax_link =
-      <a href={'http://www.intern.facebook.com/intern/wiki/index.php' .
-               '/Articles/Remarkup_Syntax_Reference'}
-         target="_blank"
-         tabindex="4">Remarkup Reference</a>;
-
-
-    $notice = null;
-    if ($this->getRequest()->getBool('diff_changed')) {
-      $notice =
-        <tools:notice title="Revision Updated Recently">
-          This revision was updated with a <strong>new diff</strong> while you
-          were providing feedback. Your inline comments appear on the
-          <strong>old diff</strong>.
-        </tools:notice>;
-    }
-
-    $engineering_repository_id = RepositoryRef::getByCallsign('E')->getID();
-    $svn_revision = $revision->getSVNRevision();
-    if ($status == DifferentialConstants::COMMITTED &&
-        $svn_revision &&
-        $revision->getRepositoryID() == $engineering_repository_id) {
-      $href = '/intern/push/request.php?rev='.$svn_revision;
-      $href = RedirectURI($href)->setTier('intern');
-      $links[] = array(
-        'merge',
-        <a href={$href} id="ask_for_merge_link">Ask for Merge</a>,
-      );
-    }
-
-  }
-
-
-  protected function renderDiffPropertyMoreLink(Diff $diff, $name) {
-    $target = <div class="star-more"
-                   style="display: none;">
-                <div class="star-loading">Loading...</div>
-              </div>;
-    $meta = array(
-      'target'  => $target->requireUniqueID(),
-      'uri'     => '/differential/diffprop/'.$diff->getID().'/'.$name.'/',
-    );
-    $more =
-      <span sigil="star-link-container">
-        &middot;
-        <a mustcapture="true"
-                 sigil="star-more"
-                  href="#"
-                  meta={$meta}>Show Details</a>
-      </span>;
-    return <x:frag>{$more}{$target}</x:frag>;
-  }
-
-
-
-  protected function getRevisionStatusDisplay(DifferentialRevision $revision) {
-    $viewer_id = $this->getRequest()->getViewerContext()->getUserID();
-    $viewer_is_owner = ($viewer_id == $revision->getOwnerID());
-    $status = $revision->getStatus();
-
-    $more = null;
-    switch ($status) {
-      case DifferentialConstants::NEEDS_REVIEW:
-        $message = 'Pending Review';
-        break;
-      case DifferentialConstants::NEEDS_REVISION:
-        $message = 'Awaiting Revision';
-        if ($viewer_is_owner) {
-          $more = 'Make the requested changes and update the revision.';
-        }
-        break;
-      case DifferentialConstants::ACCEPTED:
-        $message = 'Ready for Commit';
-        if ($viewer_is_owner) {
-          $more =
-            <x:frag>
-              Run <tt>arc commit</tt> (svn) or <tt>arc amend</tt> (git) to
-              proceed.
-            </x:frag>;
-        }
-        break;
-      case DifferentialConstants::COMMITTED:
-        $message = 'Committed';
-        $ref = $revision->getRevisionRef();
-        $more = $ref
-                ? (<a href={URI($ref->getDetailURL())}>
-                     {$ref->getName()}
-                   </a>)
-                : null;
-
-        $engineering_repository_id = RepositoryRef::getByCallsign('E')->getID();
-        if ($revision->getSVNRevision() &&
-            $revision->getRepositoryID() == $engineering_repository_id) {
-          Javelin::initBehavior(
-            'differential-revtracker-status',
-            array(
-              'uri' => '/differential/revtracker/'.$revision->getID().'/',
-              'statusId' => 'revtracker_status',
-              'mergeLinkId' => 'ask_for_merge_link',
-            ));
-        }
-        break;
-      case DifferentialConstants::ABANDONED:
-        $message = 'Abandoned';
-        break;
-      default:
-        throw new Exception("Unknown revision status.");
-    }
-
-    if ($more) {
-      $message =
-        <x:frag>
-          <strong id="revtracker_status">{$message}</strong>
-          &middot; {$more}
-        </x:frag>;
-    } else {
-      $message = <strong id="revtracker_status">{$message}</strong>;
-    }
-
-    return $message;
-  }
-
-}
-  protected function getDetailFields(
-    DifferentialRevision $revision,
-    Diff $diff,
-    array $handles) {
-
-    $sandcastle = $this->getSandcastleURI($diff);
-    if ($sandcastle) {
-      $fields['Sandcastle'] = <a href={$sandcastle}>{$sandcastle}</a>;
-    }
-
-
-    $blame_rev = $revision->getSvnBlameRevision();
-    if ($blame_rev) {
-      if ($revision->getRepositoryRef() && is_numeric($blame_rev)) {
-        $ref = new RevisionRef($revision->getRepositoryRef(), $blame_rev);
-        $fields['Blame Revision'] =
-          <a href={URI($ref->getDetailURL())}>
-            {$ref->getName()}
-          </a>;
-      } else {
-        $fields['Blame Revision'] = $blame_rev;
-      }
-    }
-
-
-    $bugzilla_id = $revision->getBugzillaID();
-    if ($bugzilla_id) {
-      $href = 'http://bugs.developers.facebook.com/show_bug.cgi?id='.
-        $bugzilla_id;
-      $fields['Bugzilla'] = <a href={$href}>{'#'.$bugzilla_id}</a>;
-    }
-
-    $fields['Apply Patch'] = <tt>arc patch --revision {$revision->getID()}</tt>;
-
-    if ($diff->getParentRevisionID()) {
-      $parent = id(new DifferentialRevision())->load(
-        $diff->getParentRevisionID());
-      if ($parent) {
-        $fields['Depends On'] =
-          <a href={$parent->getURI()}>
-            D{$parent->getID()}: {$parent->getName()}
-          </a>;
-      }
-    }
-
-    Javelin::initBehavior('differential-star-more');
-    if ($unit_details) {
-      $fields['Unit Tests'] =
-        <x:frag>
-          {$fields['Unit Tests']}
-          {$this->renderDiffPropertyMoreLink($diff, 'unit')}
-        </x:frag>;
-    }
-
-    $platform_impact = $revision->getPlatformImpact();
-    if ($platform_impact) {
-      $fields['Platform Impact'] =
-        <text linebreaks="true">{$platform_impact}</text>;
-    }
-
-    return $fields;
-  }
-
-
-*/
diff --git a/src/applications/differential/controller/revisionview/__init__.php b/src/applications/differential/controller/revisionview/__init__.php
index 3308871f23..90c9a5be5d 100644
--- a/src/applications/differential/controller/revisionview/__init__.php
+++ b/src/applications/differential/controller/revisionview/__init__.php
@@ -10,6 +10,7 @@ phutil_require_module('phabricator', 'aphront/response/404');
 phutil_require_module('phabricator', 'applications/differential/constants/action');
 phutil_require_module('phabricator', 'applications/differential/constants/revisionstatus');
 phutil_require_module('phabricator', 'applications/differential/controller/base');
+phutil_require_module('phabricator', 'applications/differential/parser/changeset');
 phutil_require_module('phabricator', 'applications/differential/storage/changeset');
 phutil_require_module('phabricator', 'applications/differential/storage/comment');
 phutil_require_module('phabricator', 'applications/differential/storage/diffproperty');
diff --git a/src/applications/differential/tasks/DifferentialTasksAttacher.php b/src/applications/differential/tasks/DifferentialTasksAttacher.php
index 72576ae250..ef3a34b40f 100644
--- a/src/applications/differential/tasks/DifferentialTasksAttacher.php
+++ b/src/applications/differential/tasks/DifferentialTasksAttacher.php
@@ -26,4 +26,15 @@ abstract class DifferentialTasksAttacher {
     $user_phid,
     DifferentialRevision $revision,
     array $task_ids);
+
+  /**
+   * This method will be called with a task and its original and new
+   * associated revisions. Implementation of this method should update
+   * the affected revisions to maintain the new associations.
+   */
+  abstract public function updateTaskRevisionAssoc(
+    $task_phid,
+    array $orig_rev_phids,
+    array $new_rev_phids);
+
 }
diff --git a/src/applications/differential/view/changesetlistview/DifferentialChangesetListView.php b/src/applications/differential/view/changesetlistview/DifferentialChangesetListView.php
index 35eacc4c9b..2d77947dc4 100644
--- a/src/applications/differential/view/changesetlistview/DifferentialChangesetListView.php
+++ b/src/applications/differential/view/changesetlistview/DifferentialChangesetListView.php
@@ -23,7 +23,7 @@ class DifferentialChangesetListView extends AphrontView {
   private $revision;
   private $renderURI = '/differential/changeset/';
   private $vsMap = array();
-  private $whitespace = null;
+  private $whitespace;
 
   public function setChangesets($changesets) {
     $this->changesets = $changesets;
diff --git a/src/applications/differential/view/difftableofcontents/DifferentialDiffTableOfContentsView.php b/src/applications/differential/view/difftableofcontents/DifferentialDiffTableOfContentsView.php
index d67e6bbece..4c6508d7cb 100644
--- a/src/applications/differential/view/difftableofcontents/DifferentialDiffTableOfContentsView.php
+++ b/src/applications/differential/view/difftableofcontents/DifferentialDiffTableOfContentsView.php
@@ -22,6 +22,7 @@ final class DifferentialDiffTableOfContentsView extends AphrontView {
   private $standaloneViewLink = null;
   private $renderURI = '/differential/changeset/';
   private $revisionID;
+  private $whitespace;
 
   public function setChangesets($changesets) {
     $this->changesets = $changesets;
@@ -43,6 +44,10 @@ final class DifferentialDiffTableOfContentsView extends AphrontView {
     return $this;
   }
 
+  public function setWhitespace($whitespace) {
+    $this->whitespace = $whitespace;
+    return $this;
+  }
 
   public function render() {
 
@@ -95,7 +100,7 @@ final class DifferentialDiffTableOfContentsView extends AphrontView {
             array(
               'id'          => $ref,
               'vs'          => $vs_id,
-              'whitespace'  => 'TODO',
+              'whitespace'  => $this->whitespace,
               'revision_id' => $this->revisionID,
             ));