I have seen a couple of posts about this, but they all seem to go in a different direction. The general theme of the problem is Handbrake not working on Mountain Lion but working on Snow Leopard. Ever since I installed Mountain Lion on an external drive, I basically haven't been able to have Handbrake properly run. Using a disc as a source, it has wavered between stopping early with only about 5-10 minutes encoded to taking the full amount of time but only resulting in a short clip or a couple of short clips. I think it has only worked once or twice total. Since I still have Snow Leopard installed on my iMac original drive, I will often go back to that install and test HB and 99.99% of the time, it works without a hitch, thus giving me no other choice to believe it is something with ML or the HB install on ML at least. So far as I know I have the same updated version on both systems. Anyone know what could be the problem? Any suggestions on fixing it aside from a two-step multi-program solution? Thanks for any help/suggestions!