I can definatly confirm that its the BS myjspace cb field plugin causing the problem.

Uninstalled the entire product range, installed and tested it right along the way and soon as that field was activated - boom. It failed.

I think its something to do with the fact the the user field is blank untill the personal page is created.

So if it it comes up again at least you all now.

PS: - and ill try and be more patient next time - but i was pulling my hair out. I knew full well it wasnt the JFBConnect but i also accept you guys are not responsible for third party community builder plugins.