After you edit a post and change it's title the redirect gives a 404 page because it can't find original page title. The redirect_to URL has the scheme I selected in the back office (stub/year/month/title), and is followed by a bunch of params. blog, title, disp, more, c, tb, and pb. About the only thing missing is post_ID, which is about the only way it's going to find the post after changing the title.

Probably not that common and certainly not that big a deal, but it's a bit annoying when it happens.