diff --git a/resources/celerity/map.php b/resources/celerity/map.php
--- a/resources/celerity/map.php
+++ b/resources/celerity/map.php
@@ -8,7 +8,7 @@
 return array(
   'names' => array(
     'core.pkg.css' => '8815f87d',
-    'core.pkg.js' => 'a27c1b62',
+    'core.pkg.js' => '65e04767',
     'darkconsole.pkg.js' => '8ab24e01',
     'differential.pkg.css' => '8af45893',
     'differential.pkg.js' => '7b5a4aa4',
@@ -203,7 +203,7 @@
     'rsrc/externals/javelin/lib/URI.js' => '6eff08aa',
     'rsrc/externals/javelin/lib/Vector.js' => '2caa8fb8',
     'rsrc/externals/javelin/lib/WebSocket.js' => '3f840822',
-    'rsrc/externals/javelin/lib/Workflow.js' => 'a2ccdfec',
+    'rsrc/externals/javelin/lib/Workflow.js' => '84d6aea0',
     'rsrc/externals/javelin/lib/__tests__/Cookie.js' => '5ed109e8',
     'rsrc/externals/javelin/lib/__tests__/DOM.js' => 'c984504b',
     'rsrc/externals/javelin/lib/__tests__/JSON.js' => '837a7d68',
@@ -691,7 +691,7 @@
     'javelin-view-renderer' => '6c2b09a2',
     'javelin-view-visitor' => 'efe49472',
     'javelin-websocket' => '3f840822',
-    'javelin-workflow' => 'a2ccdfec',
+    'javelin-workflow' => '84d6aea0',
     'lightbox-attachment-css' => '7acac05d',
     'maniphest-batch-editor' => '8f380ebc',
     'maniphest-report-css' => '6fc16517',
@@ -1420,6 +1420,17 @@
       'javelin-workflow',
       'phabricator-draggable-list',
     ),
+    '84d6aea0' => array(
+      'javelin-stratcom',
+      'javelin-request',
+      'javelin-dom',
+      'javelin-vector',
+      'javelin-install',
+      'javelin-util',
+      'javelin-mask',
+      'javelin-uri',
+      'javelin-routable',
+    ),
     '851f167c' => array(
       'javelin-behavior',
       'javelin-aphlict',
@@ -1579,17 +1590,6 @@
       'javelin-vector',
       'javelin-magical-init',
     ),
-    'a2ccdfec' => array(
-      'javelin-stratcom',
-      'javelin-request',
-      'javelin-dom',
-      'javelin-vector',
-      'javelin-install',
-      'javelin-util',
-      'javelin-mask',
-      'javelin-uri',
-      'javelin-routable',
-    ),
     'a4ae61bf' => array(
       'javelin-install',
       'javelin-dom',
diff --git a/webroot/rsrc/externals/javelin/lib/Workflow.js b/webroot/rsrc/externals/javelin/lib/Workflow.js
--- a/webroot/rsrc/externals/javelin/lib/Workflow.js
+++ b/webroot/rsrc/externals/javelin/lib/Workflow.js
@@ -172,11 +172,15 @@
           [],
           JX.Workflow._onsyntheticsubmit);
 
-        var frame = JX.DOM.getContentFrame();
-        frame.appendChild(this._root);
+        // Note that even in the presence of a content frame, we're doing
+        // everything here at top level: dialogs are fully modal and cover
+        // the entire window.
+
+        document.body.appendChild(this._root);
+
         var d = JX.Vector.getDim(this._root);
-        var v = JX.Vector.getDim(frame);
-        var s = JX.Vector.getAggregateScrollForNode(frame);
+        var v = JX.Vector.getViewport();
+        var s = JX.Vector.getScroll();
 
         // Normally, we position dialogs 100px from the top of the screen.
         // Use more space if the dialog is large (at least roughly the size
@@ -206,7 +210,9 @@
         // The `focus()` call may have scrolled the window. Scroll it back to
         // where it was before -- we want to focus the control, but not adjust
         // the scroll position.
-        JX.DOM.scrollToPosition(s.x, s.y);
+
+        // Dialogs are window-level, so scroll the window explicitly.
+        window.scrollTo(s.x, s.y);
 
       } else if (this.getHandler()) {
         this.getHandler()(r);