Vertical lines appear when dubbing to DVD

Hey all!

I just purchased a ES30VS, and I love its features and picture quality.
However, something is occuring which bothers me.

Whenever I transfer a VHS tape to DVD, whether copyrighted or not, vertical lines appear every 5 to 10 minutes. They last anywhere from 10 to 30 seconds and then disappear until the next time. They are not on the origial recording. I’ve tried everything I can think of but am not sure if something is wrong, or if this is just part of the transfer process.

When I play the tapes on the VCR portion (without dubbing) the lines don’t appear. I did notice, however, that they will briefly appear if you pause or fast-forward the tape, etc. whether you’re dubbing or not.

At first I thought it was copy protection, but then tonight I put in a home video and noticed it did the same thing.

I have also recorded directly from the TV to DVD and the quality is excellent, no lines or anything.

Any idea as to why this is happening?