…and others agree here (in Nuendo-ville).
http://steinberg.net/forum/viewtopic.php?p=99678#p99678
Sorry - it has to go please SB. A smooth, semi-opaque ‘fill’ for this AND for the fade-handle regions is much more elegant and visually indicative. Please.
Anyone else…?
No. It’s fine.
They must have got Cubase just right if that’s all their is to criticise. 
Very rare for the forum to have this few complaints about cosmetics.
Ok - thanks for your input Conman…!
I must be mistaken; no sorry, I mean it really is fine, isn’t it…?
Oh no, hang on a minute - I’m absolutely right…!! It IS ugly…!!