You are right, docholliday, I always have my rollfilm on my person, which worked fine, till recently..........some airports have a new system now where you have to put your coat through the machine too (Glasgow Airport)!
I had the same experience with 35 mm rolls which I had in my pockets, the stupid machine blieped, but the security officer was very nice about handsearching my film.
In contrary to Les, I have quite good experiences in Amsterdam Schiphol Airport. I flew to Scotland last month and, after a bit of persuasion on my side, the officers in Amsterdam were very willing to handsearch my rolls. I am not being patriotic here :o), but it probably helps that I speak the language.