1. I always seem to be getting “Error 404 – Not found” in my preview window (theme shows, main post does not). This did used to work at one point.
2. Changing the size of the post window in Options makes no difference. It stays the same size.
I did change the permalinks to %category%/%postname% and then back again but this doesn’t seem to have done anything.
I only have a few plugins installed: Autometa, Customised Post Listings, and Related Posts.