reassigning to xorg team, maybe they will have some idea on the issue.
Do you use any fancy accelaration or feature like xgl or composite?
** Changed in: evolution (Ubuntu)
Sourcepackagename: evolution => xserver-xorg-driver-nv
Assignee: Ubuntu Desktop Bugs => Ubuntu X SWAT
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Graphical glitches
https://launchpad.net/bugs/35493