Thanks for your reply. No I didn't change anything. I can literally remove the APN settings, do a battery pull, and the BB browser starts working, but everything else stops working, then when I put the details back in, reset, everything else works but not the browser.

I did some more messing, and found that if I change opera's setting for 'protocol' from 'sockets' to HTTP, then that also stops working, so I believe that setting up TCP is somehow stopping HTTP requests from working in some way.