WordPress 3.5 multisite migration – Some images dont't show

Hello,

I am migrating my current blog with 3 languages to a new multisite installation with 3 sites, one for each languages. I don’t understand why some images don’t show, when the url is correct.

For instance, if you go to https://dev.qualilogy.com/en/category/application-quality/, you can see the images on the first 3 posts, until you get to the 4th (More with less) which has an image tagged (Plus avec moins).

Copy the url of this image https://qualilogy.com/wp-content/uploads/2012/10/QualMoreWithLess.jpg into your browser and it will show.
And if you open the post (‘Continue reading’), now the image is visible.

On some other posts – like this one https://dev.qualilogy.com/en/the-future-of-application-quality/ – no photo is visible although if you look at the code, find the *.jpg and copy their url into your browser, they are loaded?

Do not hesitate to ask for any precision.
Regards,
Jean-Pierre