Unfortunately not. It will import V4.1 by herself, however. The one scene in particular that was causing me the most trouble had an M3, a V3, and a V4 character. The import failed with an "unexpected error" message. When I deleted the V4.1 character and replaced it with another V3 character (including clothes, hi-res skin, and hair) the import worked with no problems at all. I guess I'll have to write it off as another one of those mysteries that we occasionally run into!
Thanks for your suggestions!
Gordon