Video problems since memory upgrade.

[Poohba]

Since I have upgraded to 512 from 256 mem my video recording has been
nothing but trouble.  My audio/video sync is always off.  Tvtime is even
off.  When capturing its even more off.  I am not sure what to do to
resolve the issue.  I guess I can remove the 256 chip and just work with
256 but I would rather have 512.  Any suggestions would be greatly
appreciated.