I played a few days with it...very nice addon indeed.
I play AV alot and noticed the following:
I have all the group on the left side in two vertical rows of 4 groups each row.
From the side of the 2nd vertical row, all the way to the right side and bottom of my entire screen, often gets a rectangular, transparant color, covering everything.
The colors are the same ones as the Class-colors.
And often it flashes and often the color changes to another Class color.
It just occupies a part of my lower screen mostly for a few secs, and then suddenly it will be gone again.
It is very annoying cus right now it happens all the time when I am in AV battleground.
I tried a new install, but alas, it happened again :(
So I dont know what to do now. I hope you can solve this.