Comment 14 for bug 353126

Confirmed as described.

8.10 -> 9.04 upgrade, proprietary nvidia drivers, screen effects on.
Fails on WinXP->tightvnc->9.04, WinXP->realvnc->9.04, WinXP->ultravnc->9.04, 8.10->Remote Desktop Viewer->9.04

Works in all cases when screen effects switched off.