User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-GB; rv:1.8.1.1) Gecko/20060601 Firefox/2.0.0.1 (Ubuntu-edgy) Build Identifier: version 1.5.0.9 (20070103) When trying to fetch mail from a pop account when the disk is full creates some strange results. Sometimes ghost message appear that cannot be read and have no title, or the title disappear. When the problem is resolved all old messages are re-downloaded (I have set it up to save old messages on the server). This has happen a few times for me actually... Reproducible: Didn't try Steps to Reproduce: Set up an account, pop, to save old messages on the server. And make sure there are a few (I have about 9000). 1. Make sure disk is really full 2. Send email to the account 3. Check the account with Thunderbird 4. New message can show up but might not be able to read it. 5. Resolve the disk space issue 6. Press Get all new messages Actual Results: All old messages should now be downloaded again, making a big mess of your inbox Expected Results: Only the new messages should be fetched. I'm not sure if you loose any data here so.. I just mark it as a normal bug.