I am a new owner/user of a Motorola Droid 2, and after getting dozens of calendar appointments loaded into my phone I plugged it into a USB just to copy/move some pictures around. After unplugging the USB ALL of my calendar events have been deleted!???
This has happened before right after I got the phone, but this time I realized it immediately after the USB hookup was disconnected.
I have never used a Google calendar before and was not trying to sync anything....