WYSIWYG Editor Broken after Host Move.

We recently moved from one host to another and everything worked except the WYSIWYG editor. It shows, but when you make any edits to the post and hit save, nothing saves. If you hit the code button on the WYSIWYG, nothing happens.

I’ve cleared the cache, tried different browser, deactivated all plugins and upgraded WordPress and nothing worked.

If you turn off the WYSIWYG editor, writing or editing posts works fine.

When I was running WordPress 2.2.x I got an error about navigation away from the post page before saving when I hit save. In WordPress 2.3.1 I don’t get the error, but it doesn’t save.

Any help would be greatly appreciated.

Thanks