docksite inside padding

Hi,

i am using a docksite

After conversion to 2011.2.553 (officesilver) we have the problem that the docksite is using some kind of padding inside which prevents us from position elements to the border of the container. How can we turn this off?

If you have a look at this example, the green grid has some margins on all sides. We do not want this to happen. In the old office2010 style, this offset was not there....

<docking:DockSite Background="Red">
<Grid Background="Green" >
</Grid>
</docking:DockSite>