I'm having the same problem. It's very strange. Same thing as you described. Every 60 seconds, EXACTLY 60 seconds, my wifi icon will disappear and immediately reappear. I've so far experienced no connections problems, just the blinking icon. I reinstalled the iPad operating system and the problem was fixed, but started up again about a day or so later. It was happening constantly since it returned, but I just went into settings, turned off wifi completely, waited a couple seconds and turned it back on, and now it's fine. Very strange. I anticipate it's return, and hopefully its just a bug apple will fix with an upcoming software update. I'm using an apple time capsule router, by the way.