I'm on my PowerBook 867mhz 12" G4, obviously a PowerPC Macintosh. I was in my Applications folder when I noticed the circle n' slash over one of my icons. This means it's incompatible with my system, I know this because I've seen it on my Intel iMac. So the program is "Compressor" I believe it was part of the Apple video software I installed. I double-click on it and it comes up with a message saying: "Not Supported on this Architecture". I don't use the program but, this puzzles me. Any ideas?