Changing from none to normal visual effects crashes gnome-appearance-properties

[Gijutsu]

Binary package hint: gnome-control-center

Changing from none to normal visual effects crashes gnome-appearance-properties on Ubuntu Lucid 10.04 when "Keep settings" is selected. And if none of the buttons "Keep settings" and "Use previous settings" are pressed and the countdown times out, both windows becomes gray as seen in the attached screen shot.
This bug can be triggered every time the procedure is repeated.
Attached below are two screen shot of how it looks when the program freezes.

The following is logged into jockey.log when triggering the bug:
DEBUG: enables_composite(): already using nvidia driver from nondefault package

This is a regression from Ubuntu Karmic 9.10 where this did not occur.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: gnome-control-center 1:2.30.0-0ubuntu3
ProcVersionSignature: Ubuntu 2.6.32-19.28-generic 2.6.32.10+drm33.1
Uname: Linux 2.6.32-19-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Thu Apr 8 23:03:04 2010
ProcEnviron:
 LANG=en_US.utf8
 SHELL=/bin/bash
SourcePackage: gnome-control-center

[amdefeo (amdefeo)]

I can second this. I just upgraded from 9.10 to 10.04 and I am having the same issue, when I try to change the visual effects setting from none to either normal or extra the "keep setting" box just gets hung up when I choose keep setting, and none of the change take effect.

[Jean-Sebastien Gosselin (jsgosselin)]

This behavior appeared recently in Ubuntu 10.04 Beta1. I think it began after the last update I did.

[Sebastien Bacher (seb128)]

Thanks for the bug report. This particular bug has already been reported, but feel free to report any other bugs you find.