I've been using DVD Shrink 2.3 for some time without incident. However, all of a sudden I cannot backup any DVDs. It is able to encode the movies to the hard drive but when it comes to processing the VOB files it chokes and a pop-up tells me that it cannot continue because "the semaphore time period has expired". Huh?

Has anyone encountered this problem before? Any ideas on how to fix it?

Here are my system specs:
P4 2.4B @ 3.0
Asus P4PE
512MB
Windows XP
Pioneer 16x DVD-ROM
LG GSA-4040B DVD burner