Quote Originally Posted by Eric Rose
I travel all over the world on a regular basis with my cameras (mainly LF and MF), and the usual tons of film. I have never had any film that went thru as carry-on fogged. This includes everything from FP4 to Delta 3200. I also do not use lead bags to shield my films.

I suspect your problem originates with your camera.
My experience exactly. I think that people will blame the x-ray when the problem lays elsewhere.