Windows 7 RC (x64) on Dell Studio 1537 - Display Problem

After receiving my new Dell Studio 1537 laptop last week, I decided to try installing Windows 7 Release Candidate (64-bit edition).

The installation went very smoothly with all drivers installed properly and the system appeared to work faultlessly... at first. Then display glitches started appearing - the display would become fuzzy after short periods of use and only logging off and back on or restarting the laptop fixed the problem.

I have since re-installed Vista and this problem has not cropped up again, so I just wondered if anyone else had experienced similar display problems using Windows 7 RC on either this laptop or similar models, and if so whether they had managed to resolve the problem.

Thanks in advance!