I have the very same problem, after upgrading to 11.04 from lts, on a Toshiba Portege with the following controller:
> lspci | grep Display 00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03)
I don't know if this can help: when zooming in or out the problem usually disappears (it seems to be related to font size)
I have the very same problem, after upgrading to 11.04 from lts, on a Toshiba Portege with the following controller:
> lspci | grep Display
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03)
I don't know if this can help: when zooming in or out the problem usually disappears (it seems to be related to font size)