Hiya, 
 
I posted in the forum about whether you were having problems with image uploads. I've just realised, that everyone is going to be having problems due to a bug I've just spotted - on the last release of the site it looks like we broke the image upload! 
 
The good news is I'm about to release a new version. So, by the time you read this, you should be able to upload an avatar with no problems. 
 
Thanks, and sorry for the inconvenience. 
 
Cheers, 
Jim