AutoStitch seems to do a better job than the crappy ass ACDSee stitcher that came with my camera. It's got a real good stitcher algorithm core, but the GUI is rotten since it's a free research project. It would be usable except that you have to re set the options every time you use it (make sure you set Scale to 100% and change the JPEG quality to 95 or 99 or something).
Also - DO NOT UPGRADE TO THE NEW QUICKTIME !! QuickTime 7.whatever has disabled all sorts of features and made them only available in the Pro version. Those fucking cocks, they're just going to make QT even more hated than it already is, kill it like GIF. You can no longer view QT movies in full screen. I only care because I have some QT "VR" 360 degree panoramas and I can't see them fullscreen any more which ruins the effect.