I had a different experience with the dash...I was in the last beta, but did not see, nor get in on this one. I have, prior to this, had no issues with any updates. Last night, I logged in, loaded Gears 3 prior to the update splash screen, prompted for the update, clicked ok, and got the quick small download screen. I never got the shutdown, nor the long download/shutdown/download...Played gears for about two hours, and got booted from LIVE around 10:30, and was not allowed to re-connect. After verifying there was not an internet problem at my house, figured out that the update had kicked me off live.
I was able to connect long enough to do another download, and begin the new update...but still could not re-connect to LIVE. I gave up at about midnight, checked xbox.com, and verified the "server connection" issue. and went to bed... I hope the interruption will not cause an issue with the new update.
will try when I get home
"Once you learn good English...Can't nobody take it away!"
Xbox LIVE Gamertag: KEVIN G 40