This is really strange. I'm using /%postname%/ as my permalink structure (I know... I'm a rebel). Anyway, all was fine until I started working on this private post. Originally I had it password protected, but it doesn't seem to matter what it is. Every time I save it, all pages on my site (but not the blob posts or categories), go straight to the 404 page. If I look up the permalink using the get_permalink function, I can see that it's still the right page, but it WON'T go. If I re-save the private page as draft, everything works again until I save the private page again. Then I have to re-save it as private (and back to draft then back to private etc, etc.)
Please, someone tell me they know what this is?