When I login from the graphical login prompt on run level 5 there are no title bars on the windows and other problems with the window manager.
When I login from the command line on run level 3 then start X with xinit /usr/bin/gnome-session
everything seams to work OK.
One of the recent updates caused this. It may be because of the Unichrome video on this computer.
a different computer with Nevidia video doesn't have this problem.