Comment 2 for bug 862497

I have had this issue on at least two different programs where the window looses the decorations (title bar).

a. Thunderbird "New Message Window" or opening a message in a new window.

b. The second program that exhibited this issue was Compiz Configurations Settings Manager (CSSM). It too lost window decorations.

In both cases, when the application window (new message / CSSM / etc...) were maximized to full screen, the window controls appeared in the Global Menu complete with close buttons.

Because this has appeared in two separate programs that probably don't share the same code base, I suspect that the issue lies somewhere else.