The ANRNG skins look to use some form of transparency round the edges, where I should see through part of the skin at the edges, I see solid pink in all these areas.
those are the skins that work best only on MOS. I see the pink on WinUAE also. It's not like anything is "wrong". i wouldn't worry about it.
I forget what the explaination is, honestly. I just use those skins on my peg anyway.