Everything has been working fine for a while, then I started getting this problem:
My blog is at http://www.exampleserver.org/blog. When I make a post with just text, everything is fine. However, when I include an image, once I hit Save Draft, Publish, or even Preview, I am forwarded to http://www.exampleserver.org (notice no "blog" directory).
Upon going back to wp-admin and checking that post, it hasn't been created/posted/updated.
I've tried disabling all of my plugins, and even reinstalled 2.7.1, but am still getting this behavior. Any ideas?