User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; hu; rv:1.9.0.4) Gecko/2008102920 Firefox/3.0.4 Build Identifier: Thunderbird 2.0.0.18 Just under special circumstances. Reproducible: Always Steps to Reproduce: 1. Take a received mail which has huge number of adressee. 2. Click the "+" button near the list of recipients to see all of them. The divider automatically moves up to show as many email adress as it can. In the given case the place is not enough to show all the recipients (huge xmass spammer :) 3. Try to drag the divider, which divides the message list area from the message body area to see more from the lists of mails. It doesn't moves. Actual Results: The divider stops reacting to drag command.

WFM here on Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.4pre) Gecko/20091007 Lightning/1.0pre Shredder/3.0pre ID:20091007032014 Reporter could you try to see if it still happens with http://ftp.mozilla.org/pub/mozilla.org/thunderbird/nightly/latest-comm-1.9.1/ ?

RESO INCO per lack of response to last comment. If you feel this change was made in error, please respond to this bug with your reasons why.