I have a '04 V70 with 146,000 mi. I keep getting this warning on the message board when the door actually IS closed. Interior lights come on, the warning triangle on the dash lights up, windshield wipers make one sweep, and the car shudders once like you've hit a speed bump and it's startling. Message goes away when I open and shut the door. This is happening more and more often... 6 times on a 300 mi. trip, and is getting very annoying. Why is this happening? Any help would be appreciated.