Description of problem:
when windows are draged quickly horizontally they become corrupted


Version-Release number of selected component (if applicable):
Test Day:2010-09-28 Nouveau x86_64 live cd


How reproducible:


Steps to Reproduce:
1. open window
2. click on title bar
3. drag quickly left and right
  
Actual results:
window graphics corrupted


Expected results:
no corruption

Additional info:
I will attach a screenshot of a corrupted nautilus window