A couple of times I’ve had users complaining about cursor “ghosting” problems while running Gnome - that if typing something, the cursor seems to rewrite itself as it normally would (to move along the line) but not to delete the old cursor positions. So you wind up with a line of cursors. Admittedly this is not disastrous but it is irritating.

I’ve only observed this on systems with the following features: running Debian etch (testing); NVida graphics card; using the nv driver in xorg.conf.

The solution which has worked for me is simply to download and build the nvidia driver (see here for a quick how-to), edit xorg.conf to use that instead of nv, and restart X.

If you’re still seeing the problem after restarting X, check the logs (/var/log/Xorg.0.log) to make sure that the nvidia driver really is being used. I once found that it wasn’t; ps -A revealed a long-running X process which had to be killed before the new xorg.conf settings were picked up.