I am working on a product animation for a client and having some weird rendering issues. I have a custom modeled object with a couple simple lights, a camera, GI (quality set to medium) and Ambient Occlusion turned on. There are some frames in my render that, for lack of a better term, are pretty messed up. I have other parts of the object that are lit and have camera moves that do not exhibit this behavior.
I am running R13, OSX 10.8, 3.49GHz i7 Quad Core, 32 GB RAM, and an nvidia GT640.
Unfortunately I can't post a project file do to the client nature, but luckily this portion of the animation is pretty non-descript so I have posted an example video.
This was a 32 bit TIFF seq w/ Alpha channel. Photo sequence was exported as low rez h.264 out of AE.