When using TB17 and TBConversations 2.5.2, using F8 to hide/show the message pane doesn't work: the message pane hides successfully, but when it comes back, TBConv doesn't redraw the message, and I just get a blank area where the message should be.
When I disabled TBConv, without needing to restart TB, F8 works just fine with the classic message view, and the message is redrawn in the message pane correctly. So something in the triggering of message-redrawing isn't working right, somewhere on the path between TB and Conversations' hooks.
Fix issue #673.
I don't pretend to understand deeply why this race-condition happens, but that
seems to fix it.
The latest build at http://jonathan.xulforum.org/files/gcv-nightlies/ has the fix baked in. Thanks for bringing this to my attention!