Similar to the bug 428662 in that the Account dropdown is empty. Marking as critical since this makes changing server-side filters via the UI impossible. SM might or might not have the same problem. Probably a regression of bug 413781.

Marking blocking-3.0a1+, as this is a regression that breaks functionality.

This bug likely has the same root cause as bug 426715. Both are caused by code that assumes that an nsIMsgAccount will have a non-null incomingServer. It's not yet clear to me under what conditions that assumption is false.

Joshua, Are there any errors in the javascript console when you open the dialog? I'd like to be able to confirm my comment #2 hypothesis.

These are the errors I get in the console: ###!!! ASSERTION: couldn't lazily create the server : 'NS_SUCCEEDED(rv)', file /src/mozilla/mailnews/base/src/nsMsgAccount.cpp, line 93 JavaScript error: chrome://messenger/content/mail-folder-bindings.xml, line 243: acct.incomingServer is null (/me gripes about that \n in the nsMsgAccount assertion)

OK, perfect. Bug 428887 will fix this.

This should be fixed now. Please verify.