If this is true, then why (if I look in another HAND Folder , say P5) I see the same file extension and associated PNG (and these display their thumbnails correctly...). I checked the "OPEN WITH" info and both the working and wierd examples and al are tagged to Poser6, so I don't see that another app is targeted. And, the PNG files they need are there and they are not corrupt. Perhaps a MAC guru can weigh in on this... Very strange. As it sits, the files (as you say) do work--- but since I can't see the thumbnail-- it's hard to know what the selection miught really be...