Duane,
I had something happen this morning that may provide a clue. My first alarm of the day went off w/o sound. I saw the light, turned off the alarm, and put it back in night mode. I am a bit fuzzy (since i was pretty much a sleep at the time), but at some point Chumby came back with needing to activate. So I did the reboot. It came up to a text screen that said Chumby couldn't establish a connection, to reboot, and if I continued having trouble what I'm supposed to do. I rebooted, got the screen again.
Now my laptop sometimes has problems with the wireless. I have to bring the connection down and back up. So I figured it's time to check out the connection. Bring up the laptop, no issues with the wireless (not saying there weren't in the middle of the night, but not right then). Reboot chumby, and it boots just fine, and goes straight to the widgets w/o asking me which wireless connect I want.
Anyway, I wonder if my wireless dropped for a bit, and then when the Alarm was turned off and I tried to bring it back to night mode if that did the ol' deactivate thingy. Sorry I can't remember fer shur what happened this morning.