This also applies to Beta 2 of WP 2.7.
I sometimes use
<br clear="all" /> in a post or page to force a paragraph to start after the bottom of an image in a previous paragraph. I have to insert this tag in HTML view. If I switch back to Visual view, this code is stripped out.
I think this is a bug. I don't think WP should change any code that's entered in HTML view.
Or is there something verboten about this code that I don't know about?