When I try to upload a scenario I get a message saying "Publish failed: Unrecognized response from the server.". I have the latest version of Greenfoot and Java. It used to work (as you may have noticed) so I'm not sure why all of a sudden it doesn't work anymore. I do have some things which can get in the way, but uploading scenarios worked until about a week ago so I'm not sure why it doesn't work or what I have to do to make it work.