There was something wrong with Open Gl or whatever for some time. I remember it messing up for me as well, but the other options were fine. They may or may not have fixed that though.
Thats kinda trippy. I have had similar glitches happen before on a much older computer of mine... it was always stuff to do with the graphics and would be fixed fairly soon. I usually just logged out and restarted the computer and logged back in.