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Elemental Forums
I still have these problems in v.803 as I did in v.802.
As you can see in this shot the layering issue is in the bottom left corner.
DirectX Diag - http://pastebin.com/6GEJCFBu
Looking at your drivers you aren't using the latest official ones, however that doesn't seem to be the cause.
I have the exact same issue. My graphics card too is a HD4870 running on the official Catalyst 10.5 drivers and I am getting the same thing.
Edit- Here's my Dxdiag: http://pastebin.com/UqMC6PN0
cancel this.. i swear i saw the layering problem when i first loaded v.805 but after sussing and poking through different menus etc.. i cant see it at all... i count this one as fixed.. 
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