Slackware 9.1 with Thunderbird 0.5
I used Thunderbird 0.5 on XP for quite a long time and it work excellent for me.
Recently I gave up Windoze and went to Slackware 9.1 and tried Thunderbird again.
It work ok when I log on as root (imported my mail, a.s.o.), but, on other users, it starts, asks me about accounts and stuff, then shuts down.