I’ve recently moved a site to another server. I am getting this problem on the new server, but not on the old one. I don’t know what would make any difference.
I tried disabling all plugins, no good. I reinstalled wordpress 3.3.1 and it didn’t work, either.
The media uploader works just fine on the sandbox site with the exact same plugins and the same theme.
Anyone have a clue what could be causing this? This was a big project and I’m ready to roll back to 3.2