This morning my Garmin 510, which has never had any real issues showed 0 items displayed on my training page. I went through the settings to change to 6 items to display, hit the check mark button and then back whereupon the device shows that there are 0 items displayed on that training page. Other settings would not save as well. I performed a factory reset, no dice. I plugged in to the computer to make sure software was up to date, it synched and is up to date but no dice.

Any ideas?