I am not sure what happened but every image I open up is drowned in hot pink, the new un-changeable background color. I can't seem to change any of the settings to fix it. When attempting to select a color the whole palette is hot pink. Any ideas what happened?
No Mark, I've never seen this before. Since this falls under the "Very Weird" category, I would suggest deleting the Preferences file and then restart Photoshop. Check out my Posts on Preference deletion and re-setting. Photoshop Exhibits Odd Behavior and Photoshop Preference prefs