Can you please try just loading oSkin, BugGrabber and BugSack and post the error(s) that you get please.
AFAIK no one else has reported this problem and it all works for me :)
If oSkin has errors on loading then frames won't get skinned and the viewport/bottombar/topbar might not appear.
I will try to help you get to the root of the problem but will need BugGrabber error output to determine what is going wrong.
Okay ill send you an PM when i get home.