After upgrading to Tiger now Mail crashes every time I try to view any letter. I have tried rebuild as well as syncing, just to see those might help. Nonetheless, it doesn't matter which message in which mailbox I choose, Mail crashes.
By chance are you using PGP software? I was and it caused this to happen. There are 2 solutions if you are. PGP has a beta version 9 that works or unistall PGP and wait dor the release version.
Also, if you have any plug-ins (.bundle) installed, try removing them all and adding them back one by one. That was my problem. Kind of like the old extensions conflicts from our pre-X days.
