My xyloband did exactly the same! When I woke up this morning, around 6, it was flashing, just like it did yesterday night. And this afternoon it started glowing AGAIN, but this time it didn't flash but it just kept glowing red for about an hour.. First time it happened I was so surprised, I didn't know it was even possible? And actually I still don't know why it's happening... Here's the video I made yesterday (sorry for my horrible English, I was quite excited haha):
[ame=http://www.youtube.com/watch?v=N97MY7LeMms&list=UUvNrwTiEo_jXa5hEa02V9CA&feature=plcp]http://www.youtube.com/watch?v=N97MY7LeMms&list=UUvNrwTiEo_jXa5hEa02V9CA&feature=plcp[/ame]
I got 2 xylobands by the way (my own and my father's), but only the red one does this.