People turning purple?

Question

So this is a little complicated, but stick with me.
I am editing some footage in FCP. The footage consists of a girl lit under a blue light (simulating moonlight). The footage is properly color balanced, and it has a hint of blue to reflect the natural lighting.
I just color corrected it in my friend's editing suite (in order to use his HD TV as the output monitor).
Color correcting consisted primarily of crushing the blacks. We did a couple other things, but mainly that was it.
Everything looked great on his TV. We exported the files back to FCP on his computer. I then copied the color corrected quicktime files to use on my computer.
This is where things get weird.
On my computer, the color correction looks horrible. The actor looks purple! (like a character from Avatar). I opened up the files on another Mac. Same thing. The actor looks purple.
Stay with me, things get weirder. I opened up the same exact quicktime files on a PC. Everything looks great. No purple people.
I burned a DVD and played it on a TV. It looks great. I played it on a PC. It looks great. I played it on a Mac. The actor looks purple.
One final thing. Back in FCP, I took a screenshot of my computer image. I opened the screenshot on my Mac. The actor looks purple. I opened the same exact screenshot on my PC. The actor looks normal.
I really have no idea what is going on. Everything is fine on a TV and a PC, but it looks horrible on a Mac. And since the output medium could be any of these three (and the footage will most likely be viewed on other Macs), it is unacceptable for the footage to look the way it does on a Mac.
If anyone has any idea what is going on, please help.
Some information that might be useful.
FCP: version 6.0.6
Color: version 1.0.4
Footage: DV anamorphic
Raw footage codec: DV/DVCPRO - NTSC, Integer (Little Endian)
Color corrected footage codec: DV/DVCPRO - NTSC

Answer 1

Well, that would be great if you were making a music video for a "one-eyed, one-horned, purple people eater...", because I could never figure out if the eater was purple or if it only ever ate purple people... so now we'll find out.
Sounds like a ColorSync/ color management issue, and it could also be a driver YCbCr issue between Mac and Windows systems. As I understand things, you were happy at one point with the output of COLOR to some kind of "TV". I would find it remarkably odd that you would get these differences if you had been using a true Video I/O card and monitoring an SDI signal to a broadcast monitor and or waveform/vector monitor (which would be the only calibrated method for accurate color placement).
If you were somehow short-cutting the output using a DVI-bridge... then all of that color processing falls to internal Quicktime ColorSync and color management processes which may or may not be appropriate to the media... and can fall anywhere and is for the most part uncontrollable. This would be made even worse if you're attempting to do this "by eye" with no scope confirmation.
So somehow along this process, you were happy with the values on a Mac system, if you were processing the media under Apple COLOR, but it would appear that there was another process intervening in the displayed values. There aren't that many ways out of COLOR, and typically the complaint is with contrast being compromised with the 1.8/2.2 gamma incompatibility. But for a hue to be wrong, but then be reinterpreted more pleasingly under a different internal processing strategy implies that the files are being decoded and displayed in different ways. The only place that I can see that happening is in ColorSync.
Are you using any kind of third party "calibration" application? Or was your friend juicing the "TV"?
jPo