Problem with me too, 9.04 Beta. I've never had it before migrating to Jaunty. Deactivating Desktop effects, "solve" the problem, for the moment, waiting it will be patched.
9.04 Beta - AthlonXP 2600+ Barton - 1GB DDR - nVidia GeForce 6200 nVidia driver 180.37 and X.org Version: 1:7.4~5ubuntu16
Problem with me too, 9.04 Beta. I've never had it before migrating to Jaunty.
Deactivating Desktop effects, "solve" the problem, for the moment, waiting it will be patched.
9.04 Beta - AthlonXP 2600+ Barton - 1GB DDR - nVidia GeForce 6200
nVidia driver 180.37 and X.org Version: 1:7.4~5ubuntu16