Visual inspection does not reveal any damage to the threading on the crankarm or the pedal. I had my old Candies on the bike first and it did not happen with them (but since I have 3 bikes I was 1 set of pedals short so the new ones went on the new bike). It happened after I put the new ones on and so far only on the initial ride on the trainer. However, I'm rather cautious. That was the strangest feeling for my foot to be loose all of a sudden and look down to see that the pedal was attached only to my shoe!
