User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.5) Gecko/20030925 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.5) Gecko/20030925 When there are lots of recipient to a mail and you click on + to deploy the list, you only see the first ones until the end of the header pane. You can't see the last one because the header pane do not have a scroll bar. The only way to try to see more addresses is to maximise the mail window. Reproducible: Always Steps to Reproduce: 1.Take any mail with a big list of recipient 2.click on the + icon before the To: in the mail header 3.Try to see all addresses Actual Results: You can't see last addresses Expected Results: Put a scroll bar in the address pane to scroll through addresses

Don't think this is a dupe, because it doesn't describe the loss of the actual message portion, but see also bug 167405.

167405 was just duped to the same bug this is duped to. *** This bug has been marked as a duplicate of 41994 ***