I have an iPad 3g that I've been using for the last several months. Both its 3G and WiFi have functioned flawlessly.
I loaded 4.2 this afternoon. 3G is working flawlessly (thank G-D) but WiFi is "toes up". Once activated WiFi sees our network. It is able to log-on but it is not admitted to our network. Checking Settings-WiFi-On and selecting SheilaNet and then after the WiFi symbol appears on the device (in its usual place) and then ciicking on SheilaNet shows an IP Address of 169.254.159.250. Our network is 192.168.1.nnn. My treasured iPad is unable to connect to the Internet.
All of our various Windows devices (phones and laptops) are able to log in the SheilaNet.
I am flummoxed by this problem and would appreciate any suggestions.