diff --git a/resources/celerity/map.php b/resources/celerity/map.php
--- a/resources/celerity/map.php
+++ b/resources/celerity/map.php
@@ -10,7 +10,7 @@
     'conpherence.pkg.css' => 'e68cf1fa',
     'conpherence.pkg.js' => '15191c65',
     'core.pkg.css' => '6da3c0e5',
-    'core.pkg.js' => 'b305dbe2',
+    'core.pkg.js' => '27f3489f',
     'differential.pkg.css' => '113e692c',
     'differential.pkg.js' => 'f6d809c0',
     'diffusion.pkg.css' => 'a2d17c7d',
@@ -253,7 +253,7 @@
     'rsrc/externals/javelin/lib/URI.js' => 'c989ade3',
     'rsrc/externals/javelin/lib/Vector.js' => '2caa8fb8',
     'rsrc/externals/javelin/lib/WebSocket.js' => '3ffe32d6',
-    'rsrc/externals/javelin/lib/Workflow.js' => '33fea02f',
+    'rsrc/externals/javelin/lib/Workflow.js' => '7dd6653c',
     'rsrc/externals/javelin/lib/__tests__/Cookie.js' => '5ed109e8',
     'rsrc/externals/javelin/lib/__tests__/DOM.js' => 'c984504b',
     'rsrc/externals/javelin/lib/__tests__/JSON.js' => '837a7d68',
@@ -739,7 +739,7 @@
     'javelin-workboard-card' => 'c587b80f',
     'javelin-workboard-column' => '758b4758',
     'javelin-workboard-controller' => '26167537',
-    'javelin-workflow' => '33fea02f',
+    'javelin-workflow' => '7dd6653c',
     'maniphest-report-css' => '9b9580b7',
     'maniphest-task-edit-css' => 'fda62a9b',
     'maniphest-task-summary-css' => '11cc5344',
@@ -1097,17 +1097,6 @@
       'javelin-util',
       'javelin-magical-init',
     ),
-    '33fea02f' => array(
-      'javelin-stratcom',
-      'javelin-request',
-      'javelin-dom',
-      'javelin-vector',
-      'javelin-install',
-      'javelin-util',
-      'javelin-mask',
-      'javelin-uri',
-      'javelin-routable',
-    ),
     '358b8c04' => array(
       'javelin-install',
       'javelin-util',
@@ -1538,6 +1527,17 @@
       'javelin-request',
       'javelin-router',
     ),
+    '7dd6653c' => array(
+      'javelin-stratcom',
+      'javelin-request',
+      'javelin-dom',
+      'javelin-vector',
+      'javelin-install',
+      'javelin-util',
+      'javelin-mask',
+      'javelin-uri',
+      'javelin-routable',
+    ),
     '7e41274a' => array(
       'javelin-install',
     ),
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
@@ -151,6 +151,10 @@
         // NOTE: Don't remove the current dialog yet because additional
         // handlers may still want to access the nodes.
 
+        // Disable whatever button the user clicked to prevent duplicate
+        // submission mistakes when you accidentally . See T11145.
+        button.disabled = true;
+
         active
           .setURI(form.getAttribute('action') || active.getURI())
           .setDataWithListOfPairs(data)