Horrible flashing problem

Hey guys, I’ve got a slight problem and I can’t figure out what’s going on.

HERE IS A LINK TO THE RENDERED ANIMATION

my render seems to flash in parts and I can’t figure out why, have any of you seen this kinda thing before?

The help would be much appreciated.

I haven’t looked at the animation, but I am guessing maybe there is an alpha mapped object set to ‘shadeless’ interferring with the ambient occlusion?

Thanks for the input Modron but I can’t find anything alpha mapped and shadeless. Plus I haven’t any AO on.

Try to recalculate the normals of your “travelator”, remove the doubles or check if there isn’t any face overlapping.