This bug also affects me (Lucid Beta1 amd64 livecd):
Linux ubuntu 2.6.32-16-generic #25-Ubuntu SMP Tue Mar 9 16:33:12 UTC 2010 x86_64 GNU/Linux
Sony Vaio BZ12XN with Intel 4500MHD graphics.
This bug also affects me (Lucid Beta1 amd64 livecd):
Linux ubuntu 2.6.32-16-generic #25-Ubuntu SMP Tue Mar 9 16:33:12 UTC 2010 x86_64 GNU/Linux
Sony Vaio BZ12XN with Intel 4500MHD graphics.