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There is no thumbnail since I boot linux on my machine, at the end of may. Before that it was alright:

https://steemit.com/comic/@lighteye/b-c-stands-for-blockchain-may-17-2017-freak-show

I'm glad you like it @bescouted :)

But some of your posts are showing the thumbnail...

There is no thumbnail since I boot linux on my machine only on BC is 4 BlockChain comic. Maybe this is because of the GIMP editing, but I cannot say for sure.