One of our users is reporting that occasionally (eg: a couple of times a month) when they send an email from SWA it does not appear in their sent items folder.
Unfortunately, I've been unable to find anything in the logs or even a way to reproduce the problem.

User is running Firefox 2 on Scalix 11.0.3, and is the only user with this problem. I have removed the user's imap cache, but this has not returned any of the sent items that were lost. Have also opened the user's mailbox in outlook, but the emails do not appear there either.
Has anyone else ever seen a problem like this before? I've searched through the forum, bugzilla and checked the changelogs of newer versions of Scalix, but haven't seen anything.
thanks.