diff --git a/resources/celerity/map.php b/resources/celerity/map.php
index 1502be2eac..85e21f4a12 100644
--- a/resources/celerity/map.php
+++ b/resources/celerity/map.php
@@ -11,11 +11,11 @@ return array(
     'core.pkg.js' => '328799d0',
     'darkconsole.pkg.js' => 'e7393ebb',
     'differential.pkg.css' => 'bb338e4b',
-    'differential.pkg.js' => '45b3b51d',
+    'differential.pkg.js' => '63a77807',
     'diffusion.pkg.css' => '591664fa',
     'diffusion.pkg.js' => '0115b37c',
     'maniphest.pkg.css' => '68d4dd3d',
-    'maniphest.pkg.js' => 'df4aa49f',
+    'maniphest.pkg.js' => '2f4f52c2',
     'rsrc/css/aphront/aphront-bars.css' => '231ac33c',
     'rsrc/css/aphront/dark-console.css' => '6378ef3d',
     'rsrc/css/aphront/dialog-view.css' => '9b32db0a',
@@ -349,7 +349,7 @@ return array(
     'rsrc/js/application/differential/DifferentialInlineCommentEditor.js' => 'd4c87bf4',
     'rsrc/js/application/differential/behavior-add-reviewers-and-ccs.js' => 'e10f8e18',
     'rsrc/js/application/differential/behavior-comment-jump.js' => '4fdb476d',
-    'rsrc/js/application/differential/behavior-comment-preview.js' => '8e1389b5',
+    'rsrc/js/application/differential/behavior-comment-preview.js' => 'b064af76',
     'rsrc/js/application/differential/behavior-diff-radios.js' => 'e1ff79b1',
     'rsrc/js/application/differential/behavior-dropdown-menus.js' => '2035b9cb',
     'rsrc/js/application/differential/behavior-edit-inline-comments.js' => 'e723c323',
@@ -379,7 +379,7 @@ return array(
     'rsrc/js/application/maniphest/behavior-subpriorityeditor.js' => '84845b5b',
     'rsrc/js/application/maniphest/behavior-transaction-controls.js' => '44168bad',
     'rsrc/js/application/maniphest/behavior-transaction-expand.js' => '5fefb143',
-    'rsrc/js/application/maniphest/behavior-transaction-preview.js' => 'f8248bc5',
+    'rsrc/js/application/maniphest/behavior-transaction-preview.js' => '4c95d29e',
     'rsrc/js/application/owners/OwnersPathEditor.js' => 'aa1733d0',
     'rsrc/js/application/owners/owners-path-editor.js' => '7a68dda3',
     'rsrc/js/application/passphrase/passphrase-credential-control.js' => '3cb0b2fc',
@@ -466,7 +466,7 @@ return array(
     'rsrc/js/core/behavior-scrollbar.js' => '834a1173',
     'rsrc/js/core/behavior-search-typeahead.js' => '048330fa',
     'rsrc/js/core/behavior-select-on-click.js' => '4e3e79a6',
-    'rsrc/js/core/behavior-time-typeahead.js' => '8cf340fd',
+    'rsrc/js/core/behavior-time-typeahead.js' => '3416cef7',
     'rsrc/js/core/behavior-toggle-class.js' => '5d7c9f33',
     'rsrc/js/core/behavior-tokenizer.js' => 'b3a4b884',
     'rsrc/js/core/behavior-tooltip.js' => '3ee3408b',
@@ -559,7 +559,7 @@ return array(
     'javelin-behavior-differential-diff-radios' => 'e1ff79b1',
     'javelin-behavior-differential-dropdown-menus' => '2035b9cb',
     'javelin-behavior-differential-edit-inline-comments' => 'e723c323',
-    'javelin-behavior-differential-feedback-preview' => '8e1389b5',
+    'javelin-behavior-differential-feedback-preview' => 'b064af76',
     'javelin-behavior-differential-keyboard-navigation' => '2c426492',
     'javelin-behavior-differential-populate' => '8694b1df',
     'javelin-behavior-differential-show-field-details' => 'bba9eedf',
@@ -590,7 +590,7 @@ return array(
     'javelin-behavior-maniphest-subpriority-editor' => '84845b5b',
     'javelin-behavior-maniphest-transaction-controls' => '44168bad',
     'javelin-behavior-maniphest-transaction-expand' => '5fefb143',
-    'javelin-behavior-maniphest-transaction-preview' => 'f8248bc5',
+    'javelin-behavior-maniphest-transaction-preview' => '4c95d29e',
     'javelin-behavior-owners-path-editor' => '7a68dda3',
     'javelin-behavior-passphrase-credential-control' => '3cb0b2fc',
     'javelin-behavior-persona-login' => '9414ff18',
@@ -641,7 +641,7 @@ return array(
     'javelin-behavior-slowvote-embed' => '887ad43f',
     'javelin-behavior-stripe-payment-form' => '3f5d6dbf',
     'javelin-behavior-test-payment-form' => 'fc91ab6c',
-    'javelin-behavior-time-typeahead' => '8cf340fd',
+    'javelin-behavior-time-typeahead' => '3416cef7',
     'javelin-behavior-toggle-class' => '5d7c9f33',
     'javelin-behavior-typeahead-browse' => '635de1ec',
     'javelin-behavior-typeahead-search' => '93d0c9e3',
@@ -1041,6 +1041,14 @@ return array(
     '331b1611' => array(
       'javelin-install',
     ),
+    '3416cef7' => array(
+      'javelin-behavior',
+      'javelin-util',
+      'javelin-dom',
+      'javelin-stratcom',
+      'javelin-vector',
+      'javelin-typeahead-static-source',
+    ),
     '3975b470' => array(
       'javelin-behavior',
       'javelin-dom',
@@ -1130,6 +1138,14 @@ return array(
       'javelin-request',
       'javelin-util',
     ),
+    '4c95d29e' => array(
+      'javelin-behavior',
+      'javelin-dom',
+      'javelin-util',
+      'javelin-json',
+      'javelin-stratcom',
+      'phabricator-shaped-request',
+    ),
     '4cebc641' => array(
       'javelin-install',
     ),
@@ -1484,27 +1500,11 @@ return array(
       'javelin-stratcom',
       'javelin-behavior',
     ),
-    '8cf340fd' => array(
-      'javelin-behavior',
-      'javelin-util',
-      'javelin-dom',
-      'javelin-stratcom',
-      'javelin-vector',
-      'javelin-typeahead-static-source',
-    ),
     '8cf6d262' => array(
       'javelin-install',
       'javelin-dom',
       'javelin-util',
     ),
-    '8e1389b5' => array(
-      'javelin-behavior',
-      'javelin-stratcom',
-      'javelin-dom',
-      'javelin-request',
-      'javelin-util',
-      'phabricator-shaped-request',
-    ),
     '8ef9ab58' => array(
       'javelin-behavior',
       'javelin-dom',
@@ -1663,6 +1663,14 @@ return array(
       'javelin-stratcom',
       'javelin-install',
     ),
+    'b064af76' => array(
+      'javelin-behavior',
+      'javelin-stratcom',
+      'javelin-dom',
+      'javelin-request',
+      'javelin-util',
+      'phabricator-shaped-request',
+    ),
     'b1a59974' => array(
       'javelin-behavior',
       'javelin-aphlict',
@@ -1983,14 +1991,6 @@ return array(
       'javelin-typeahead-ondemand-source',
       'javelin-util',
     ),
-    'f8248bc5' => array(
-      'javelin-behavior',
-      'javelin-dom',
-      'javelin-util',
-      'javelin-json',
-      'javelin-stratcom',
-      'phabricator-shaped-request',
-    ),
     'f829edb3' => array(
       'javelin-view',
       'javelin-install',
diff --git a/webroot/rsrc/js/application/differential/behavior-comment-preview.js b/webroot/rsrc/js/application/differential/behavior-comment-preview.js
index 3cf50535fd..283e6ea12c 100644
--- a/webroot/rsrc/js/application/differential/behavior-comment-preview.js
+++ b/webroot/rsrc/js/application/differential/behavior-comment-preview.js
@@ -21,10 +21,25 @@ JX.behavior('differential-feedback-preview', function(config) {
 
   var callback = function(r) {
     var preview = JX.$(config.preview);
-    JX.DOM.setContent(preview, JX.$H(r));
-    JX.Stratcom.invoke('differential-preview-update', null, {
-      container: preview
-    });
+    var data = getdata();
+    var hide = true;
+    for (var field in data) {
+      if (field == 'action') {
+        continue;
+      }
+      if (data[field]) {
+        hide = false;
+      }
+    }
+    if (hide) {
+      JX.DOM.hide(preview);
+    } else {
+      JX.DOM.setContent(preview, JX.$H(r));
+      JX.Stratcom.invoke('differential-preview-update', null, {
+        container: preview
+      });
+      JX.DOM.show(preview);
+    }
   };
 
   var getdata = function() {
diff --git a/webroot/rsrc/js/application/maniphest/behavior-transaction-preview.js b/webroot/rsrc/js/application/maniphest/behavior-transaction-preview.js
index ca18eb69d4..66b58b1f4b 100644
--- a/webroot/rsrc/js/application/maniphest/behavior-transaction-preview.js
+++ b/webroot/rsrc/js/application/maniphest/behavior-transaction-preview.js
@@ -14,7 +14,23 @@ JX.behavior('maniphest-transaction-preview', function(config) {
   var action = JX.$(config.action);
 
   var callback = function(r) {
-    JX.DOM.setContent(JX.$(config.preview), JX.$H(r));
+    var panel = JX.$(config.preview);
+    var data = getdata();
+    var hide = true;
+    for (var field in data) {
+      if (field == 'action') {
+        continue;
+      }
+      if (data[field]) {
+        hide = false;
+      }
+    }
+    if (hide) {
+      JX.DOM.hide(panel);
+    } else {
+      JX.DOM.setContent(panel, JX.$H(r));
+      JX.DOM.show(panel);
+    }
   };
 
   var getdata = function() {