Sometimes software problems [I love it:"softwear" - clothes for working at the computer - coverall baby sleepers with the attached feet. In neutral grey, of course, to not contaminate screen color accuracy.] can make us crazy.
Today was a good example - I marqueed a bathroom, but the walls glowed yellow.
Insanity!
It turned out to be a sky object - but not contained in the marquee area. It is obvious that the sky object's symbol and hotspots aren't defining it well. Moving the object well away from the room eliminated the glowing effect.
Dwight Atkinson