User blog comment:Dopp/Technical Update: March 14, 2011/@comment-1997905-20110314232726/@comment-1997905-20110315162520

I haven't used the RTE in a while, so I'm not quite sure. But many users say they've seen this kind of stuff - most of it should be on this thread. It definitely tinkers with paragraph breaks (specifically when you have many spaces between paragraphs), but I think people have been seeing other, more subtle things too.