[banden]

I think you are on the right track. I've found that Killing Apps creates similar kinds of issues so I stopped doing killing apps (applications with clocks stop working, widgets don't update, timers stop working)

From what I understand the Android platform is very good at managing available memory and will close programs as it sees fit, negating the need to manually kill apps.

The consensus for the most part on this forum is that Task Killers are really only beneficial for troubleshooting issues on the Motorola Droid. I would say you need to a'banden' your WinMo ways and come to the dark side... I've actually uninstalled my task killer.