Jim, I'm afraid it is something is wrong with 12. I recently backed everything up to DVD's and deleted it from the hard drive. (The reason is involved and doesn't matter.) I restored some of it to test 12. When I had the problems I had with 12, I was concerned for my files; all 15,000 of them. Out of this concern, as a result of what just happened, I uninstalled 12, re-installed 8 and returned all my files to the hard drive. Everything works fine. As far as the cover art, I never maintained an album art folder. I always kept it empty to make sure the art was being stored in the file. I can't explain all that has happened but except for the fact that version 8 never imported track no. 32 :-), which some how never got fixed, it works fine so I think I'll keep it.
Thanks again for all your help. Both of you.