"Graph rendering" problems

[RCES]

Pehaps you (all) can help. Ripping, stripping and burning DVDs were fine for quite a while, then suddenly VOBrator and IFOedit 1) issue GPFs, and 2) throw a "Failed to render graph" error wheneverI try to view VOBs or preview through IFOedit's play button (the errors are worded differently for both apps, but they appear to be related, both mentioning graphs.) I've done some rather drastic things to try to correct this, including a completely new, fdisked and formatted boot drive and 100 GB secondary data drive, but I'm still getting the problem.

Nutshell: Worked fine under Win2000, then failed (can't think of what might have changed), re-formatted drive to Win 98, same problem.

Any ideas? Do I need new Activex components or something? Thanks.

RCES