Problem: Clicking a hyperlink or an attachment inside a mail message crashed mail.app.
I’ve removed everything inside the mail folder and got it to work. After I re-installed Spam Sieve the above problem re-appeared.
Could this be a Spam Sieve problem?
Probably not, since SpamSieve has no interaction with the display of Mail messages, links, or attachments. However, if you find Mail’s crash log files in the folder:
Thanks for sending the crash log. It looks like you also have the Attachment Tamer plug-in and an input manager haxie installed, so I suggest that you remove those and see if that helps.
The user fixed the problem by doing a clean install of Lion. Another user in the Apple forums was seeing a similar crash and fixed it by removing the obsolete MessageUidsAlreadyDownloaded2 file.