I don't see the image on my "summary" cards, but i see them through the validator tool

[AdrienVH]

Hi !

Evrything is in the title ! I can’t see any image in my cards, but i see them through the validator tool !

An example : https://twitter.com/AdrienVH/status/320315212098068480

I use WordPress (last stable version) with an hand-updated theme.

Thanks for Help !

Sincerely,

Adrien