I'm working on a Mac in CS6. When viewing in typical display performance text looks fine, but images (as expected) are not so great. However, when switching over to high quality display, the text looks horrible and the images are fine. Is anyone else having this issue? I didn't have this happen in CS5.5.
I haven't seen or heard of this before. Check the prefs to be sure that all the sliders are pushed all the way to the right for High Quality Display.
You can also try trashing your prefs. See Replace Your Preferences