For some reason within the last few months a problem with the colors that Photoshop is displaying in the application. The colors are not actually wrong if you check the color picker, it's just how it actually looks when you're working on it. In addition, when you are moving the tab in Photoshop if it's not maximized, the color is correct.
How it currently looks:
How it should and does look when actually moving the file within Photoshop
Has anyone seen this?
Actually that was only half of it...next is to see if an updated video card driver can fix the problem permanently. Check with the GPU manufacturer's site (ATI/NVidia).
What happened was probably that Windows update delivered a buggy (and outdated) driver. Next time check "hide this update" and it won't show up again.