Mine decided it wanted to be a drag chute today . About 6 miles into my ride home, I pulled over to shed a layer and that is when I discovered that my rear rack was now in a vertical state (with my heavy non-bike specific jacket strapped to it ). Both of the mounting screws that attaches the rack at the upper part of the seat tube were MIA. Luckily, I finished the ride without any further mishap.

The rack is now in "time out" in the garage, while my rear fender gets to see the light of day again.