I'm experiencing this issue too, with an Intel 965 VGA. Moreover, since the upgrade to Lucid I have also experienced simlar graphics problems with other applications, namely XMBC and Gnome-Shell. They are both not usable in my configuration, but they worked perfectly before the upgrade.
Therefore I think it is really something related to the graphic driver. Strangely enough, compiz is working perfectly.
I'm experiencing this issue too, with an Intel 965 VGA. Moreover, since the upgrade to Lucid I have also experienced simlar graphics problems with other applications, namely XMBC and Gnome-Shell. They are both not usable in my configuration, but they worked perfectly before the upgrade.
Therefore I think it is really something related to the graphic driver. Strangely enough, compiz is working perfectly.