I can confirm that this occurs in Gutsy.
$ lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation 82915G/GV/910GL Integrated Graphics Controller (rev 04)
$ uname -r Linux <computername> 2.6.22-13-generic #1 SMP Thu Oct 4 17:18:44 GMT 2007 i686 GNU/Linux
I have noticed it with Desktop Effects turned off and more regularly with Desktop Effects turned on.
I can confirm that this occurs in Gutsy.
$ lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation 82915G/GV/910GL Integrated Graphics Controller (rev 04)
$ uname -r
Linux <computername> 2.6.22-13-generic #1 SMP Thu Oct 4 17:18:44 GMT 2007 i686 GNU/Linux
I have noticed it with Desktop Effects turned off and more regularly with Desktop Effects turned on.