Thunderbird folder problems
From ITSwiki
Problem: mails missing from folder, mixed subject lines, missing subejct lines etc.
Solution: Rebuilding folder indexes. This can be done by rightclicking on the folder an choosing 'properties'-> 'repair folder'.
If you need to repair many folders, you can also:
close Thunderbird
remove all .msf files from the thunderbird directory on your PC. (The directory is found in 'Server Settings' under 'Local Directory').
When you start thunderbird again all indexes will be rebuilt - this may take some time.
