User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:5.0) Gecko/20100101 Firefox/5.0 Build ID: 20110615151330 Steps to reproduce: I moved messages (by drag and drop) from my inbox into folders. Actual results: Prior versions of thunderbird would highlight the folder you are dragging to, which helps you be sure it will go into the correct folder. Version 5.0 does not highlight the folder where the emails will be dropped. It does appear to mover the messages correctly, but the old feature is important to the user to assure them the messages will end up in the correct place. Expected results: The destination folder should be highlighted when messages are dragged over it to confirm where they will be dropped (as in prior versions).
This is fixed in the upcoming 6.0 version.