Terry, the user names have always turned Red for me too when I hover the curser over the name. When it changes to Green, is if I actually click on a name and it takes you to that person's own page. Once I've done that, whether it's my own name or someone elses...then the name changes to Green and stays that way for a day or so.
This morning when I did that with my name, it changed to Black, which it's never done before, but as soon as I posted in this thread my name changed to Green. If I just hover the curser over my name it still changes to Red, just like always.
Now I've probably confused the heck out of everybody...but just try it. Click on a name...it should turn Green, (or maybe Black?).