Actually it’s now working and I’m not sure which change fixed it! During various tests I had ticked the box that archives images by date. After the upgrade to WP3.0.1 and a test to try uploading a header (which still threw up the same error message as yesterday) I decided to untick the option to store images by date. Then I went back to the header and was able to successfully upload it!
Well, that’s a relief anyway.
Edit: The uploads folder is still set to 777. I tried changing it back to 755 but got the error again. I guess I’ll have to keep it at 777.
Just tried that again and still no luck. I’ve also just upgraded to WordPress 3.0.1 and tried everything again with no results. Any ideas anyone?
Thanks