My recent experience on international is that there has been no problem on hold or cabin baggage. However, I would suggest taking it easily accessible in your carry-on and reading carefully the notices on the machine - most of them say they are safe upto 400ASA at least, but I remember some places (DFW?) which say explicitly that all film will be fogged.
In this case for films in canisters there is no problem just taking them out and showing them to security who will let you take them round the x-ray machine. Film actually inside a camera may be more problematical.