I found the base of my clip in pedal that broke off a week ago. I had gone back to look for it at the time (unclipped, went to clip back in, discovered I couldn't). It was right where I thought it should be, but I've ridden by there all week, and never saw it until today.

I'm not sure if this is good luck or bad luck. They are cheap $39 Performance Campus Pedals. Forté Campus Pedals - Save On Components During National Bike Month

I guess ten years of use, with the last 3 using them through the salt and snow in MN winters was too much. I'm thinking the screws just rusted out. Now I have a project to see if I can fix them.