Let’s say you’re not sending referer headers somehow, such as setting network.http.sendRefererHeader to 0 in Firefox. Then let’s say you start work on writing a blog post. With this setup, clicking on the Save and Continue Editing button will give you a nice fat blank screen. Luckily, your post is saved, but wordpress is relying on the referer header to get back to the proper place. IMHO, this is pretty dumb behavior.

I should really report this bug upstream, I’ll try to remember to tomorrow.