After "upgrading" from firmware 1.11 to 1.21, I immediately noticed that every router web page wanted to load MSXML 5.0, according to the yellow info bar that appeared at the top of every router page in IE7 (Vista Ultimate). Allowing this had no effect; no page changes were apparent, and the yellow bar remained. Not a great start, but it was soon to get much worse, as the router proceeded to reboot itself every 1.5 minutes or so. It was a bit of a race to download and reinstall 1.11; it took two attempts to download and three attempts to reinstall, but now I'm back in business running 1.11. Any idea what's wrong with 1.21? After installing 1.21, I power-cycled the router, but no joy, and I tried resetting it to factory defaults and reinstalling the 1.21 firmware, but again, no joy. It just totally did not work for me. FWIW, I have three wired devices; my PC using a 1 Gb Intel PRO-1000 PCIe card and two HD HomeRuns.