Oh, but i thought this was about each individual tiles having a border... it seems that this is about the entire surface as a whole. Then, i also do have that normal "rescaling" border - but it isn't the only place where such things happen.
All (if not most) screens are basicly framed up & designed in a basic ratio of 1024x768 resolution and thus, simply re-adjust to whatever settings one may have active.
Just the panomaric wide monitors must show up a pretty nifty & immersive backdrop and would, in fact i guess, have a much wider black border for the planet surfaces.
My oldy Samsung-SyncMaster 16" does feel sooooo *compressed* at times!
While the NVidia 6200AGP could in fact spread it all out up to 2048x1536(85hz) on a flat LCD... but, i can't see it - yet.