You mean this? Not really sure what you mean by thumbnail.
All my thumbnails are shifted down by 75% - so I only see the tops, lol.
Hereās my post from February that explains it better 
Oh, that does suck! Have you tried on different graphic settings to see if you could get them to load?
The core of it is that skinr removes a non english letter from the Windows user
and tryes to make the skinr chase file on a Windows user that does not existe (so obviously it fails every time)
its sadly not a settings thing 
Same. But they always were that way since the beginning for me. Not that I like it, but I figure thatās way way way down the list of things for CCP to fix. I donāt have high hopes this will be fixed.
This is how I see SKINr thumbnails:
I wish more people would make custom skins to bring the price down.
Prices arenāt that bad, only slightly more than what it costs to make. Make your own if you think you can do it cheaper.
2b is cheap?
Depends on the ship, capital yup, frigate nope.
Overpriced is Overpriced.
Like I said, if you can make it cheaper, go ahead.
The problem is that some of the best metallic colors are limited use and stupid expensive.
As long as Custom Skins cost PLEX, there is a pretty expensive lower limit anyway. So, they will never get really ācheapā.
Was SKNR meant to be a āstatus thingā?
Try, just try to look at the big picture.
Iām looking out for the little guy.
It was made to consume PLEX so the PLEX demand rises, so the PLEX price rises, so the motivation to buy PLEX for RL cash rises, so more RL cash goes into CCPs pockets. And at the same time create a business opportunity for creative EVE players and let people customize their ships with cosmetics that donāt affect balance.
So, Win-Win-Win-Win? If you canāt afford it, use one of the cheaper CCP skins. Or the original skin, isnāt looking that bad on most ships.