The latest thunderbird is broken. It constantly gives errors saying it dropped connection to imap. But there is nothing wrong with my imap server, or my connection. thunderbird is the only program that is having trouble.
I read somewhere that it might be related to folders
but clicking 'repair folder' doesnt help and again, there aren't any other programs having this problem. only thunderbird.
Huh, I fixed it by changing the number of connections to the cache from 5 to 2 under server settings -> advanced
5 was the default