Dear list, I think this is a known problem, since I have heard (misheard) a few words about it.
In beamer, when I delete one or multiple frames, the skeleton of the deleted part will remain. That is to say, the frame, columns, item ... environments will remain, although all texts are removed. I have to select again, change all environments to standard and delete again. Happens in 1.5.svn, haven't tried in 1.4.1. Bo