Thank you so much for creating this area for us! There are enough of us using this software (or trying to!) and no other active forums to get help at, so this will be a wonderful opportunity for us to share ideas, solutions, ask questions, etc.
To kick things off, I'll just post a quickie. I had been wondering if Commotion 4.1 Pro would run under Vista (since there are reportedly problems running other older software in Vista). While I have not done so myself, another Commotion user told me that he DOES run CP 4.1 under Vista Ultimate, so I would guess that it would work with the other Vista versions.
For those of you who have Commotion but haven't really used it yet, or still just thinking about getting it (Ebay is the place!), I highly recommend it. In its day, it was a professionally used program (many movies, TV shows, commercials used it.), and I believe it originally cost something like $1000. Now it can be had for only $100 (I actually got mine in an Ebay auction for even less!). It can do SO much, all wrapped up in one program: rotoscoping, motion tracking, auto-painting, super-cloning, color correction, all sorts of visual effects, multi-layer compositing, and so much more. There is a bit of a learning curve, but there is an excellent DVD tutorial package you can buy that really helps.
And now we have VFF to help, too!