There is no 190a5_15 skin in the skins index list. I removed the erroneous entry from the downloads page. Not sure how it ended up there, but thanks for point it out.
Near as I can tell, it looks to have been some remnant leftover from 10/2009.
EDIT: At one time there was a 190a5_15, but for whatever reason, it appears to have been partially removed from the system. The paperwork for it is gone. I am at a loss on this one.
EDIT2: Ok, number 15 was deleted because it was a duplicate of number 10. The skinner may have submitted it twice, or was trying to update the skin, but failed to include the skin reference number so we took it as a new entry.
So, with the mystery solved, I have killed off 190a5_15 throughout the system.