diff --git a/resources/celerity/map.php b/resources/celerity/map.php
--- a/resources/celerity/map.php
+++ b/resources/celerity/map.php
@@ -422,7 +422,7 @@
     'rsrc/js/application/phortune/phortune-credit-card-form.js' => '2290aeef',
     'rsrc/js/application/policy/behavior-policy-control.js' => 'd0c516d5',
     'rsrc/js/application/policy/behavior-policy-rule-editor.js' => '5e9f347c',
-    'rsrc/js/application/projects/WorkboardBoard.js' => '52291776',
+    'rsrc/js/application/projects/WorkboardBoard.js' => 'fe7cb52a',
     'rsrc/js/application/projects/WorkboardCard.js' => 'c587b80f',
     'rsrc/js/application/projects/WorkboardColumn.js' => 'bae58312',
     'rsrc/js/application/projects/WorkboardController.js' => '55baf5ed',
@@ -750,7 +750,7 @@
     'javelin-view-renderer' => '6c2b09a2',
     'javelin-view-visitor' => 'efe49472',
     'javelin-websocket' => 'e292eaf4',
-    'javelin-workboard-board' => '52291776',
+    'javelin-workboard-board' => 'fe7cb52a',
     'javelin-workboard-card' => 'c587b80f',
     'javelin-workboard-column' => 'bae58312',
     'javelin-workboard-controller' => '55baf5ed',
@@ -1297,15 +1297,6 @@
       'javelin-vector',
       'javelin-typeahead-static-source',
     ),
-    52291776 => array(
-      'javelin-install',
-      'javelin-dom',
-      'javelin-util',
-      'javelin-stratcom',
-      'javelin-workflow',
-      'phabricator-draggable-list',
-      'javelin-workboard-column',
-    ),
     '5359e785' => array(
       'javelin-install',
       'javelin-util',
@@ -2219,6 +2210,15 @@
       'javelin-view-visitor',
       'javelin-util',
     ),
+    'fe7cb52a' => array(
+      'javelin-install',
+      'javelin-dom',
+      'javelin-util',
+      'javelin-stratcom',
+      'javelin-workflow',
+      'phabricator-draggable-list',
+      'javelin-workboard-column',
+    ),
     'fea0eb47' => array(
       'javelin-install',
     ),
diff --git a/webroot/rsrc/js/application/projects/WorkboardBoard.js b/webroot/rsrc/js/application/projects/WorkboardBoard.js
--- a/webroot/rsrc/js/application/projects/WorkboardBoard.js
+++ b/webroot/rsrc/js/application/projects/WorkboardBoard.js
@@ -216,8 +216,18 @@
       }
 
       var column_maps = response.columnMaps;
+      var natural_column;
       for (var natural_phid in column_maps) {
-        this.getColumn(natural_phid).setNaturalOrder(column_maps[natural_phid]);
+        natural_column = this.getColumn(natural_phid);
+        if (!natural_column) {
+          // Our view of the board may be out of date, so we might get back
+          // information about columns that aren't visible. Just ignore the
+          // position information for any columns we aren't displaying on the
+          // client.
+          continue;
+        }
+
+        natural_column.setNaturalOrder(column_maps[natural_phid]);
       }
 
       var property_maps = response.propertyMaps;