Seems like every Rogers APN have “brown-outs” once in a while…
It is my new hypothesis concerning my application’s intermittent failures over 2G. I had the same kind of problems this morning with the internet.com APN and now it works… I have no other clues now but I suspect that it’s a provider thing.
EDIT It seems like I can trigger the problem by shutting down the phone and fix it by “visiting” the “Access Point” in the settings without changing anything.