Quite a handful of problems to look at:
<b>Enhancements</b>
<li>Index rebuild option would be good. Bugzilla <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=81141">81141</a></li>
<li>Customisable folder order. Submitted to bugzilla as bug <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=318467">318467</a></li>
<b>Common bugs</b>
<li>Folder names beginning with a dash or tilde - suggestion that contents of mailboxes may be being deleted. Need to chase this up with Owen and try reproduce first.</li>
<li>Forwarding of inline images breaks, bugzilla <a href="https://bugzilla.mozilla.org/votes.cgi?action=show_bug&bug_id=315625">315625</a></li>
<li>Profile manager deletes some non-TB files if placed in a folder with other files, bug <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=302087">302087</a>. Potentially nasty, but only a cornercase.</li>
<li>Zero length files in windows are problematic with system cleaners such as System Mechanic. Logged in bugzilla as <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=318471">318471</a>.</li>