<Photoshop Colors Incorrect>

I was wondering if anybody here had any idea as to why my Photoshop displays incorrect colors. For example, a dark blood-red in my photoshop looks faint, washed out lighter red.

Here’s what I’ve tried since this has happened:
Swapped video cards: Nvidia Ti200 64 meg to Nvidia 6800 GT 256 mb
Swapped processors: AMD XP 1800 to AMD 64 3000+
Swapped RAM: Muskin PC2700 512 to Muskin PC3200 1024
Swapped Mobo: Asus A7A266 to Asus A8V Deluxe
Upraded OS: Windows XP to Windows XP SP2
Upgraded Photoshop: CS to CS2
Tested different FTP programs.

I’m out of stuff to investigate. The only thing I think I can try is uninstalling my monitor software, and profiles, and re-installing them. But my settings are on default.

Does anybody happend to know any other solutions? This is not even a common problem, so I don’t know what to really do anymore.