Comment 1 for bug 295079

There is another similar effect which I just thought might be related. Basically the same thing happens in gnome-terminal. I.e. output of programs, for example 'ls' or just paging a file with 'less' sometimes fails to update the display (see screenshot). As with the qt problem it's just the display, i.e. after switching back and forth one Desktop it looks fine again.
Just for the sake of completeness: the system is running on a Lenovo R61 with NVidia Quadro video card.