No, it's not the old problem. I did a search and didn't find anything. iPad running stock 4.2.1. I connect to my AP at home and stay connected. No problems. At work, we have a wireless network that has access to the Internet only, not our internal network. We control access to this wireless network using Cisco 'hoteling' software which requires you to authenticate via a browser. No other security, e.g., WEP, WPA, etc. This connection is used mainly by guests, contractors, etc. When my iPad display powers down, soon thereafter, I lose connection to this wireless network. The odd things are; 1. Some times there's still the wireless 'icon' in the upper left hand corner. 2. Settings---WiFi still indicates I am connected to the wireless network. But no application can get to the Internet. I have to go into Settings, turn WiFi off and on again to trigger the Authentication process. Why? I did check with the people who manage the Cisco software and they drop any connection that's been inactive for more than 2 hours, but the problem I am seeing seems connected to the display going to sleep.