For a long time Thunderbird have given me problems. The most occurring one is when Thunderbird want to move a message to the "sent" folder - and for this need(or does not need) to access my mail-server. Now i also have problems with time-out for something simple like saving a draft to the draft folder. Today I quite a bit work in creating a mail that i wanted to save as a draft - but Thunderbird failed to do that and the whole mail is lost. As a programmer since the stone-age I really can not understand how its even remotely possible that a Windows program can not save a file to a specified folder over and over again.