First off, this is my first post ever, whoooo...
Now that we're past that, I noticed this when I was watching this video and playing CC at the same time. I tried to explain to my friend about it, but he was just convinced I was high. (I do not do drugs <_<)
Running windows XP SP3. CC is at a reso of 1680x480 (computer resolution is 1680 x 1050)... I use 480 because if I make it...larger... I get unfun black bars on the top/bottom. The 1680 allows me long sight lines for fun sniping.
I took a video of it with my crappy digital camera, but it works. What is going on is I have VLC (a cool media player) running behind the CC window. I noticed it, and tried to take a screenshot, but the screenshot was CHANGING. (You'll see what I mean when you look at the video). My friend suggested I use my camera that I have in real life. I then took this video. I'm using gimp 2.4.4, CC build 23, and VLC version 0.9.6.99.
Sorry about the unsteady in the beginning, I had to move my hand...obviously. I've made this long enough! The link is below.
Oh yeah. Around the "tear" in the CC space area, the stars also glitter, for whatever reason, but they don't appear on the camera. I've no idea why this is so. Pretty odd. Just... thought I'd share it with you guys.

http://www.mediafire.com/download.php?zv5ifcmhld5
Download link for it. 11.88MB, 18 seconds, .avi

To anybody wondering: That's the "1776" skit/thing that Robot Chicken did, a spoof of "300". I think it's fairly funny, just the "extreme"ness of it.

I would question why you thought playing a movie while running CC was ever a good idea in the first place.
Still waiting for WMP to stop being such an idiot, will comment when it stops or I kill it in favor of zoom.

EDIT: Hm, looks kinds interesting. I wonder why it would only affect the stars.

If I recall correctly, VLC renders video differently than some other players; resulting in a black screenshot when you try to use printscreen and paste it into Paint, etc.
The video will show up on the black screenshot only while the player is open; it's quite wierd.

That's why VLC has it's own screenshot tool :>

HAH! Ok, so I just had VLC playing on the desktop alone, then I took a screenshot (print screen), opened up gimp, and pasted it into that. In the screenshot where VLC was (Pretty much in the middle) VLC was STILL PLAYING THROUGH IT. I could move gimp/the screenshot, and if I moved it so the VLC window in the screenshot was moved from where VLC was really, there was a black square. If I moved the 'screenshot vlc' to where the real VLC was, it played through. It's quite odd... </confirming what that other guy said>

VLC bleeds video through on black areas. What you were seeing was VLC video being screenshotted as black, then the video bleeding through the black.

haha this is happening to me right now