We're getting a fairly frequent random failure of this test on our Windows tinderboxes: TEST-UNEXPECTED-FAIL | e:\buildbot\win32-comm-central-check\build\mail\test\mozmill\message-header\test-reply-to-list-from-address-selection.js | test_Reply_To_List_From_Address EXCEPTION: Timed out waiting for window open! at: test-window-helpers.js line 193 Error("Timed out waiting for window open!") 0 WindowWatcher_waitForWindowOpen("msgcompose") test-window-helpers.js 193 wait_for_new_window("msgcompose") test-window-helpers.js 504 wait_for_compose_window() test-compose-helpers.js 166 open_compose_with_reply_to_list() test-compose-helpers.js 121 test_Reply_To_List_From_Address() test-reply-to-list-from-address-selection.js 133 frame.js 474 frame.js 530 frame.js 573 frame.js 417 frame.js 579 server.js 164 server.js 168 TEST-PASS | teardownModule Full log: http://tinderbox.mozilla.org/showlog.cgi?log=Thunderbird/1280116501.1280120592.12218.gz#err0 Ideas/patches would be appreciated to help keep the tree green.

I'm hoping this will fix the issue. From what I can tell, the original version of the test_Reply_To_List_From_Address would do this: 1) Select a folder 2) Select a message in the folder list (no wait for load) 3) Plan for a window that never opens 4) Opens the message in a tab (no wait for load) 5) Try to respond to message. With the patch we'll do: 1) Select a folder 2) Select a message 3) Wait for the message to finish loading 4) Try to respond to the message. I've got a rubber-stamp (rs) from bwinton to land this test-only change: http://hg.mozilla.org/comm-central/rev/b47b4511c5a8

I'm hoping that patch will fix it, so tentatively marking as fixed.