User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4a) Gecko/20030401 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4a) Gecko/20030401 When displaying a mail with a lot of recipients in the To: field in the 3-pane-window, you can click the (+) next to the recipients to expand that list. If the list is longer than the message pane, clicking (-) to minimize that list fails to redraw the message body that was hidden below the addresses. Reproducible: Always Steps to Reproduce: 1. read a mail with a lot of recipients 2. click the (+) next to the addresses 3. the message pane has to be lower than the list of addresses 4. click (-) to minimize the list Actual Results: list doesn't appear to minimize Expected Results: redraw message body try highlighting the message body after minimizing the address list. It's actually there, but not redrawn.
This is, very nearly, a dupe of bug 167468; the difference is that you are talking about using the 'twisty' to expand the To/Cc list, and that bug is talking about using View|Headers. I'm sure fixing one will fix the other. As noted in that bug, it has probably been fixed as part of the work for bug 194638; however, I don't believe that the fix for 194638 is available on any builds from mozilla.org -- the fix went in after 1.4RC1 was put up, and the nightly builds are now 1.5 (trunk). When 1.4RC2 (or final) is released, the fix should be visible; at that time, we can tell whether this bug and/or 167468 have been fixed.
*** This bug has been marked as a duplicate of 167468 ***