diff --git a/resources/celerity/map.php b/resources/celerity/map.php
index 944dc09de6..3e748b2f34 100644
--- a/resources/celerity/map.php
+++ b/resources/celerity/map.php
@@ -523,7 +523,7 @@ return array(
     'rsrc/js/phui/behavior-phui-tab-group.js' => '0a0b10e9',
     'rsrc/js/phuix/PHUIXActionListView.js' => 'b5c256b8',
     'rsrc/js/phuix/PHUIXActionView.js' => '8cf6d262',
-    'rsrc/js/phuix/PHUIXAutocomplete.js' => '9196fb06',
+    'rsrc/js/phuix/PHUIXAutocomplete.js' => '6d86ce8b',
     'rsrc/js/phuix/PHUIXDropdownMenu.js' => '82e270da',
     'rsrc/js/phuix/PHUIXFormControl.js' => 'e15869a8',
     'rsrc/js/phuix/PHUIXIconView.js' => 'bff6884b',
@@ -871,7 +871,7 @@ return array(
     'phui-workpanel-view-css' => '92197373',
     'phuix-action-list-view' => 'b5c256b8',
     'phuix-action-view' => '8cf6d262',
-    'phuix-autocomplete' => '9196fb06',
+    'phuix-autocomplete' => '6d86ce8b',
     'phuix-dropdown-menu' => '82e270da',
     'phuix-form-control-view' => 'e15869a8',
     'phuix-icon-view' => 'bff6884b',
@@ -1441,6 +1441,12 @@ return array(
       'javelin-typeahead',
       'javelin-uri',
     ),
+    '6d86ce8b' => array(
+      'javelin-install',
+      'javelin-dom',
+      'phuix-icon-view',
+      'phabricator-prefab',
+    ),
     '70baed2f' => array(
       'javelin-install',
       'javelin-dom',
@@ -1608,12 +1614,6 @@ return array(
       'javelin-dom',
       'javelin-request',
     ),
-    '9196fb06' => array(
-      'javelin-install',
-      'javelin-dom',
-      'phuix-icon-view',
-      'phabricator-prefab',
-    ),
     92197373 => array(
       'phui-workcard-view-css',
     ),
diff --git a/webroot/rsrc/js/phuix/PHUIXAutocomplete.js b/webroot/rsrc/js/phuix/PHUIXAutocomplete.js
index 801fa36ffb..94f37dc413 100644
--- a/webroot/rsrc/js/phuix/PHUIXAutocomplete.js
+++ b/webroot/rsrc/js/phuix/PHUIXAutocomplete.js
@@ -197,7 +197,11 @@ JX.install('PHUIXAutocomplete', {
     _onkeypress: function(e) {
       var r = e.getRawEvent();
 
-      if (r.metaKey || r.altKey || r.ctrlKey) {
+      // NOTE: We allow events to continue with "altKey", because you need
+      // to press Alt to type characters like "@" on a German keyboard layout.
+      // The cost of misfiring autocompleters is very small since we do not
+      // eat the keystroke. See T10252.
+      if (r.metaKey || r.ctrlKey) {
         return;
       }