Argghh. My message envelope area only displays as a one-pixel thick line under the threadpane grippie. I cannot see any of the message fields that aren't shown in threadpane, so this is a major loss of functionality. No amount of resizing of things gets the envelope area back. I believe it's related to the collapsed envelope view, because when I made a new build, for some reason the envelope came back displaying "all headers" mode. I flicked between all and normal header views a couple of times, but as soon as I collapsed the envelope area down, it was gone. I cannot get the envelope area back. If anyone knows how to get the envelope area back into uncollapsed mode (editing some file while mozilla isn't running?), so I can work around this, please let me know.

dup of 107707 Collapsed header view doesn't show up (even after restart) A workaround can be found in the last comment. *** This bug has been marked as a duplicate of 107707 ***

verified as a duplicate