solution to problem: IMAP mail disappears when changing computers
First, thank you for making thunderbird portable! There is a slight problem, though, when using IMAP servers. Thunderbird seems to write the absolute path to the mail folders in panacea.dat, in the profile directory. When the drive letter changes, Thunderbird gets confused, and after starting it again, all previous imap mail messages disappear. To fix this problem, the drive letter for the folders specified in panacea.dat must be updated before thunderbird is started. I've written a little batch file to do this, I wanted to share it, so I'm attaching it. However, I'm sure there would be a better way to do this.