Im also affected.
Lubuntu 11.04 amd64 on an EeePc 1015PN
Freezes everytime when i try to resize the Terminal (have to restart)
Same blackrectangle behavior as described above.
- lxterminal 0.1.9-0ubuntu3
- nvidia-current 270.41.06-0ubuntu1
Not reproducable with a clean Lubuntu 11.04 in a Virtualbox 4.x environment.
When i change to another Terminal like rxvt, everything is fine.