Fellow BB users-
When menu screen pops up that gives you the options to open, cancel, or save, you'll see your browser bar say "requesting" and subsequently "loading". Let the browser bar load until nearly loading, and this seems to alleviate the issue. It can take 2-3 minutes and it's a bit annoying, but I've had good success with a stable stream that way. It's as though the new OS doesn't provide sufficient time or capability to buffer the stream. This is an issue with RIM and the phone, not LiveATC.