Photoshop :: Wonky Colors?

all of the colors in Photoshop decided to go more than a little "off". Every image I edit in Photoshop, and every image I copy into Photoshop from an outside source, loses a somewhat noticeable degree of color quality. What's more, all of the palette colors for my Tools have gone off, too- blue, for example, is less saturated and slightly more violet than it should be. Here's a couple examples to show you what I mean:

who seems to have inherited a sickly yellow sheen during her ten second trip to Photoshop Land.

Random bollocks I pulled off the internet, notice the shift in color quality.

Photoshop doesn't save the new colors, and everything it prints and everything it saves, when viewed with other image software, looks identical to when it went in. The image only goes funny when it's being displayed in Photoshop, but it's still annoying since it's giving me an inaccurate idea of what the picture will look like when finished. I'm using Photoshop CS2, all my drivers are up to date, Windows XP, no new hardware changes, etc etc if anyone wants more specs I can post them, but like I said Photoshop has been running fine since the dinosaurs roamed the Earth and only now decided to bugn out on me. If anyone knows what might be causing this, or what could be done to fix it (besides "buy CS3"),