Yesterday when I turned it on, I got a several error messages and it did a new things and then shut down. When I tried to turn it on again, I got the triangle on the screen and it wouldn't do anything. I just pulled out the battery and put it back in and now it turned on and seems to be working but I would like to know what happened.
According to the userguide on page 13, that errors is a general notification, usually a sync error. You can most likely clear it from the notification screen or else just try powercycling device and see if that will clear.
I hope this was helpful.