I think I found the answer to my own question. Found post:
http://sadoun.com/Forum/phpBB2/viewt...fbd5f774288e50
which says that ver 2.39 fixes the
HD freeze problem I observed, so I think it will be worth it to upgrade. I see some motor problems were fixed with earlier versions, but that isn't important to me with a slaved system.
Sorry for wasting bandwidth. Searching was easier than I thought.