Sometimes, and more recently than before, my 8900 gets stuck on the "sending data" arrow. The arrow in the upper right pointing up when the BB is sending data, and the arrow pointing down for receiving data.
When it gets stuck on the up arrow, it will sometimes do that for 15 minutes. In that time I'm not able to send, receive any data on any web application, including email. And then it will just fix itself after a few minutes. But when you're chatting, this can get really annoying. The only way to fix it is to turn off my mobile network and turn it back on, or just wait.
Is anybody else experiencing this problem and knows if there's an app or some issue causing it?