Motorola Xoom :: Endless Bootup Loop After 3.1 Update?

Originally I had a US Xoom. After the 3.1 update, so many months ago, it started rebooting almost as soon as it had booted. The reboot trigger seemed to be when it connected with the Wifi. A factory reset would cure it for a few hours but otherwise turning off the wifi was the only permanent solution.Motorola fixed it by giving me a UK Xoom - and 3.0. And it was good until the much anticipated, and delayed, 3.1 update, and it started again. After a bit i realised it was a combination of an old and slightly unreliable Wifi base-station and, I assume, a change in the Android Wifi s/w that made it less tolerant of imperfections. Now I reboot the base-station.