Recently I see more and more websites using color invertion as a hover visualization. For me it's really annoying as I usually start to read the first few words and than hover over the line to have a visual/kinesthetic feedback in which line I am. So I hover over and it gets inverted ... which takes a few miliseconds to adapt to the new font color.
I guess this is coming from the selection color from Windows (and maybe other operating systems). But why? Only because of the better contrast?