i took off all my wheels to inspect the rotors before bleeding them. i noticed a slight line that looks like the beginning of a crack in the drivers side front rotor. it also hasn't been doing it lately apart from last night when it did it for 3 stops then didn't continue. but when it does it and i park the car i can clearly smell brake fluid and when i was changing my axles the other day whattodobo noticed that it smelled like a locked caliper back there. i couldn't smell anything but i trusted his judgment.