Thunderbird 3 performance slowdowns

Ever since I moved over to Thunderbird 3 in Windows, I’ve noticed slowdowns when trying to read my IMAP mail. I’ve turned off synchronization so that everything is done via our CentOS imap servers running dovecot and haproxy.

  1. Faking out the e-mail messages – I’ll click on an e-mail in my inbox and Thunderbird will highlight it, but my message doesn’t actually change. I have to select another e-mail first and then click back at the one I want to read to get it to work.
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