Sorry, my plan was to cover this in the release announcement last night. I worked on the announcement for about an hour and then I did some strange key combination and ended up on a different page and FCKeditor lost my work. It was a long day and I was tired so I put off re-doing the release announcement until this morning.
In any case, the error is because Poll and Survey were combined into a new set of dlls. You need to delete the following dlls from your /bin folder:
Then just touch your Web.config file to recycel the app.
The above features are now in: