I just discovered a new crashes bug in Ulead DVD Workshop (or is it TMPGEnc?)

Whenever I import a DVD PAL compliant MPEG2 file that has a size larger than 853,268,484 bytes (not too accurate) into DVDWS, it crashes (without any error displays) and brings me back to Windows.

I've done many experiments with the file. I tried trimming it many times until at a point where the trimmed mpeg file is 853,268,484 bytes or smaller, it works! it loads perfectly as a DVD PAL compliant MPEG file (Field B) into my DVDWS.
I have also tried merging a set of smaller files (that was previously perfectly accepted with DVDWS) to a one bigger file that exceeds few megabytes of 853,268,484 (this number is not an accurate borderline) then DVDWS start crashing with it.

Does anyone got the same problem?