How are you importing them into Vegas? Are you using
File | Import | DVD Camcorder Disc? That is the proper way to import but I've also read about problems with some DVD's using this method.
There is a tool called Womble that will convert DVD .VOB files to .MPG files. It's not free but it does have a free trial and it's worth the money if you decide to use it. I would download the free trial and convert the VOB's to MPG's and see if it works.
BTW, going from VHS tape to DVD to editing and then back to DVD will not give you the best quality if there is rendering involved. If you have a lot of VHS tapes to digitize, it is much better to purchase a device like the Canopus ADVC-55 that will create DV AVI files which will have much higher quality.
~jr
http://www.johnrofrano.com
http://www.vasst.com
