You know how when you're painting, you can hold ALT and it will pick a colour from the canvas? Well, for some reason, mine still picks up the colour but it sets it to the background colour instead of the foreground colour. And when I actually select the colour picker tool, it will only select the background colour but when I hold Alt, it selects the foreground colour. Basically it's flipped where it's supposed to select. Do you know how to flip it back? It's driving me mad. Thanks.
In the Color Palette (Window>Color) click on the foreground swatch. A "focus ring" will appear around it.
Oh my god. You know what, I KNEW that as well and just completely had a blonde moment. Thank you so much XD