When I put my mouse on the titlebar buttons they have weird borders.
This happens on and of every 2 seconds I hover over them.
It does it for every icon, on every program and every monitor.
The below part of the screenie is the correct one.
I'm running DF beta 10 and Windows 7 with dual monitor where the primary is the left one (if it matters ).
I agree that the glow effect isn't 100% the same as Windows, but because of the way Windows renders this it's extremely difficult to get a pixel-perfect match in all situations. I believe that it's nearly perfect, and if a chance comes up later to improve it I definitely will.