I'm not sure that was a "Let's pick one of the two" decision.
In any case, see:
http://groups.google.com/group/mozilla.dev.apps.thunderbird/browse_frm/thread/976eac144db31696
https://bugzilla.mozilla.org/show_bug.cgi?id=22687
[cross-post and follow-up set to mozilla.dev.apps.thunderbird]
--
Chris Ilias
mozilla.test.multimedia moderator
Mozilla links <http://ilias.ca>
(Please do not email me tech support questions)
Let me back in as I started this thread.
After re-installing FF 1.5, I downloaded the latest versions of my
extensions that were FF2 compatible, un-installed some of my extensions
including "Nightly tester" and the installed FF2. I then re-installed
the latest versions of those extensions and all is well :)