I cleared every cache available! LOL
Still nothing…
Thank you for your help anyway 
Weird. Please do let us know if they come back OK…
By the way – can you tell me what it was that was the cause of the issue and the attempt to load the x2 retina images? I would like to try it and see if I can find the problem.
Andy, I removed FF completely, any folder related to it.
Installed it again and I still cannot see the avatars. I see them in forum perfectly, but I cannot see them in the author box in the articles and in the comments. Really strange…But it looks like I am the only one…
As for the retina, it is a function in the theme I am using, called Customizr.
You can find it HERE.
I am using the Pro version, maybe the free one doesn’t have that functions, I don’t know…
I think the strange thing really is that everyone else can see them. I will bring it up here to see if there are any ideas…
It’s really strange…
I looked at the site today from my other pc at the shop, the avatars are there, where they are supposed to be.
Oh well, no big deal as long as everyone else can see them. I can use Chrome instead 
I have none, Andy.
My pc crashed so I got a temporary one. They are working on my disc trying to get all my files back. A real mess…
I am using this pc just temporary so I haven’t installed anything.