Red prim areas in SL

Not sure how to best describe this, but since Saturday I am now seeing the red areas on some invisiprims and sculpties. When I hit CTRL+ALT and T, I see even more (as you are supposed to). I did not change any settings on my computer, but wonder if anyone else is seeing this too? I have not updated my browser, as it seems to work like windlight on my computer- looking more like a blurry cartoon than realistic. Thanks in advance!

Can't check the viewer right now, but there's another "highlight stuff in red" option, some beacon related option ... crtl+n should be the shortcut, as far as I remember.

Lillith- thank you, thank you, thank you SO much! That was just the trick! I must have been typing too fast and hit it??? Don't know but life is back to normal!