my friend has been having a curious -- and devastating problem -- on his bike.
he's had 5 flats the last ten times he's rode it, on different wheels and tires and tubes. last night, he got a brand new pair of IRO singlespeed wheels, had the rimtape, tube and tire professionally mounted at a reputable local bike shop, and on his 1 mile ride already had experienced a flat.
the brake rims aren't doing it, nothing is touching the wheel/rim/tire. so, extraordinarily bad luck or something withe frame? he's not a heavy guy and the bike is his size (its a little small, but just a little)