One more time! (You can't delete/replace posts any longer, so I now have to splatter your board with single replies, ha!) There's one more test you could try. Check if the folders-popup ("textures" on your screenshots) is working: If it "pops up" normally (at the place you click) then Poser expects the box this size (meaning that the bug is likely within Poser). If it appears left or right from the place it should, then Poser doesn't know about the missing left side (more likely a system bug).