#mainContentArea should have it's own padding-top value rather than depending on #hierarchy's padding-top value

This is how #mainContentArea styling looks like: (colibri.css: line 3437)

#mainContentArea {
  background:#FFFFFF none repeat scroll 0 0;
  padding:0 25px 5px;
}

As you can see this styling does not define a padding-top value (it's set to 0). Now if you look at #hierarchy styling:

#hierarchy {
  font-size:90%;
  padding-top:25px;
}

Since breadcrumbs (#hierarchy) is the first thing that occurs inside #mainContentArea, the rendered output looks pretty ok with this layout. However, this causes problems with pages that doesn't contain breadcrumbs like Admin UIs.

I think it would be more appropriate if we move the "padding-top:25px;" from #hierarchy to #mainContentArea. This will fix the problem with admin UIs and it sounds more logical too.