I've broke 1 spoke before. I think it was incorrect tension through out the wheel that caused it. I had trued the rim a couple of hundred miles before it broke.
Broke rule #1 in commuting 101 and did not check the weather before I left this morning. Was in the sun the first 30 minutes then spent the last 45 minutes in heavy rain. To add insult to injury I got to follow a garbage truck for 2 miles. Man that was rough. Those trucks really smell.
Ride home was nice 90 degrees but really muggy.