Experiencing some weird behaviour in Photoshop CS5 on a Mac (Mavericks). I've tried resetting all tools, restarting Photoshop and made sure the image is RGB mode (8-bit) but the color picker won't color-pick correctly from external images, websites, pdfs etc.
It works ok within the current document i.e. I can color pick from the layers in my Photoshop document fine, just not elements outside of Photoshop. It was working before, so not sure what's happened. Here's a video of the behaviour: