I was having intermittent wifi issues with my iPad, I did all the tweaks suggested by Apple, but no real luck. So I took it to my local Apple store where I had to change a cracked MacBook case on the off chance they could look at the iPad. Would you believe it the Apple genius tested it and just gave me a replacement. He said that the fault was there and he was happy to change it. Piece of luck, and it seems to be ok so far! If others are having problems, do the same as me!