I've recently upgraded to Wordpress 2.5.1. I'm able to upload my images perfectly and able to insert them into a post using a gallery. However, when I try to insert a single image into the post using the "Insert into post" button, I get the following error:
Not Acceptable
An appropriate representation of the requested resource /wp-admin/media-upload.php could not be found on this server.
This errors occurs both in Firefox and IE. I tried re-uploading all the files in wp-admin and wp-includes to no avail. I've not tried inserting a single image in 2.5 so I can't comment if it worked before.
Hope I can get some help with this error. The only work-around I can think of now is to insert an image manually after upload but this kind of defeats the purpose of the new media feature.
Thanks in advance!