David, I'd suggest taking a look a Popwire Compression Master 3.1 for the above formats. CM's AVC output is really amazing (about 15% better than Squeeze IMO), and their MPEG-1 encoding has improved quite a bit as well (now about 30% better than Squeeze). If there is a bug with Squeeze and Tiger, I wouldn't hold my breadth for a fix. Popwire on the otherhand has excellent support and will work with you one-on-one to make sure there is fix relatively soon if you discover a bug. And CM 3.1 does take advantage of some of the underlying features Tiger brings, so there is less of chance of Tiger specific bugs being discovered.