Nearly everything else about FF is very well laid out and I really like the GUI. But that one undocumented quirk is really a moneky's wrench. Not only is it wretched, it's important! It seems that the FF developers are aware of the issue. I found this bug, which they seem to think is mostly resolved, but seems to be pointing out the same problem.
https://bugzilla.mozilla.org/show_bug.cgi?id=263541
It appears that they did not think this bug was worth holding up the 1.0 release for, but it is supposedly fixed in the nightly builds. Glad it's "fixed" but I think it should have been fixed for 1.0. I'm sure we'll be reading about this as people start reviewing TBird like they did FF. I only hope it's NOT a bug on the Windows platform, since that will get the largest number of reviews.
The behavior with the default being "local folders" was the same on Windows, that's where I noticed it first.
I just downloaded 1.0 for Windows, and when I went to Message Filters the default is now my first POP account (in alphabetical order). That should help clarify it for people.
Also, there is now an actual checkbox under the enabled field, instead of that dot when a filter is not enabled. I think that's a lot clearer, too.
Haven't seen the 1.0 Linux yet, probably will later today.
Rich