Hi, I have created a meta bug http://bugzilla.mozilla.org/show_bug.cgi?id=157217 for mailnews 3 pane window issues. This bug will be used for tracking purposes. Please post patches & ideas to the corresponding bugs. I have already added bunch of bugs to be tracked. There are more 3 pane bugs and I will be adding them to this one going forward.
Bhuvan
