I personally always put my film in a clear plastic bag and remove it from my carry on when going through the x-ray scanners. I figure that this prevents any problems should the inspectors decide they want to rescan or randomly search my bag for any reason.
Originally Posted by TimFox
When I did this in Beijing airport recently, the security personnel spotted my bag of film in the tray on the conveyor belt and immediately insisted on hand checking without even being asked.
I found southeast Asia to be very accommodating to film shooters. My bag went through 15-20 x-ray scans, but my film didn't go through any.
I don't even bother asking for hand checking in European airports, however.