padding/margin of reading modes VS the preview frame

Hi,

Since the transition to the new layout, there is an incoherence in the margin/padding of the preview (i)frame regarding the ones applied to the reading modes. If you look at the capture I added to this post, when using the preview window, a part of the category list is hidden, while in the same time, at the right, a part of the names of the feeds are still visible (plus the number of unread items)...
Before the transition to the new layout, when I was using the preview function, the frame appearing was completely hiding the background (category, items, twitter/favorites/... blocks) which lets the user concentrate on the selected items. I think this layout was less cluttered than the current one regarding the preview function.

Apart from this, the news layout with the list of category at the left is really awesome !
Thanks a lot.

padding/margin of the content below the preview window