I've never encountered this one on any WP installation...so being my first WPMU, I'm hoping someone will know.
Software: WPMU 2.9.2, BP 18.104.22.168
Plugins: Anti-Splog, WP-SpamFree, BuddyPress, NextGen Gallery 1.5.1 (Problem occured before I installed this).
That's pretty much it. It's a new install (today). Everything was working ok. I installed the anti-spam stuff and posted a new article. I then deacitvate the anti-spam stuff to see if that helped...it didn't.
The image gallery (not NextGen, the standard one), does everything perfectly except show the images. The placeholders appear in the post at the correct size. Even the captions work. The images even appear in the image editor, but nowhere else. Not even in the 'Media' section. All the meta-data is there...
The only clue I've got is via NextGen which won't upload images. I get a HTTP ERROR. But the URL/Address that it displays is correct.