I install and use the latest LGPL version of Qt. I use the 64-bit Linux version. I am not using the Fedora specific install. I use the nVidia display drivers installed using yum.

[andy@pitonyak ~]$ rpm -qa | grep -i nvidia
kmod-nvidia-190.53-1.fc12.5.x86_64
nvidia-settings-1.0-3.2.fc12.x86_64
xorg-x11-drv-nvidia-190.53-1.fc12.x86_64
kmod-nvidia-2.6.31.12-174.2.22.fc12.x86_64-190.53-1.fc12.5.x86_64
kmod-nvidia-2.6.31.12-174.2.19.fc12.x86_64-190.53-1.fc12.4.x86_64
kmod-nvidia-2.6.31.12-174.2.3.fc12.x86_64-190.53-1.fc12.1.x86_64
xorg-x11-drv-nvidia-libs-190.53-1.fc12.x86_64
nvidia-xconfig-1.0-1.fc12.x86_64

While editing my files, I have significant screen refresh issues. For example, select a few lines in the editor and delete them. The text does not simply scroll up to show the actual structure of the file. If I use the keyboard to scroll down through the file, however, the screen repaints properly one line at a time.

Anyone else seen this problem?

I am generally inclined to blame to the video driver. This seems like a sufficiently common setup that others should also have this problem.