MahApps/MahApps.Metro — pull request #273 by punker76 (2012-12-14 22:09:31+00:00)
Title: fix background for MetroCircleButtonStyle …

with a BaseDark style i have a ugly background at my buttons (different
from window background), so i removed the background from the inner grid
and use the transparent templated background.
i hope this is ok...