So, I'm pretty sure this is a server / hosting problem but I'm stumped.
Something has changed with my WordPress install (MU using subdomains) so that now, I can't preview or update any page or post containing an image URL.
I assumed it was a corrupt WP install, so I created a totally fresh one (on the same host), but it has the exact same problem.
Basically, if a post /page contains any image url, I get bounced to a 404 page when updating or previewing.
Remove the image (any image URL - internal or external), and it updates / previews OK.
I've tried different browsers, cleared cache and cookies -but nothing makes any difference
I'd really appreciate some help please?
php.ini info if that helps