Created attachment 392815 [details] Test Script When I try to check and uncheck checkboxes of the security warning dialog (Preferences > Security > Warning Messages > Settings) nothing happens. My Mozmill test will just hang until I close the dialog. At this point the Mozmill test fails because it has lost reference to the window I just closed. I'm not sure if this is a dupe of bug 492136 but it is definitely related. In my case, I'm not looking for failures. I just can't do anything with the dialog. This blocks bug 508669 and bug 508670.
The code which opens the modal dialog has to be placed *after* the "md.start()" line. Otherwise the current thread hangs and Mozmill too. => Invalid.
Excellent...that fixed this issue.