=== modified file 'libgwibber/streams.vala'
--- old/libgwibber/streams.vala	2012-03-19 13:35:30 +0000
+++ new/libgwibber/streams.vala	2012-04-04 20:53:49 +0000
@@ -213,13 +213,21 @@
                 model = create_model ();
               }
               model.row_removed.connect((_m, _i) => {
+                var to_remove = new GLib.List <string> ();
                 foreach (var v in seen.entries)
                 {
                   if (v.value == _i)
                   {
-                    seen.unset(v.key);
+                    /* defer calling unset until after we are done iterating 
+                     * the HashMap, it will resize making the iterator invalid
+                     * This is fixed in the 0.7 series of libgee
+                     * https://bugzilla.gnome.org/show_bug.cgi?id=671327
+                     */
+                    to_remove.prepend (v.key);
                   }
                 }
+                foreach (var v in to_remove)
+                  seen.unset(v);
               });
               Idle.add(() => {
                 refresh_model_async.begin ();