Adv images quality

[AlessandroTax]

Hello,

am I the onlyone having problems with images and logo quality on my platform?

If I upload, for example, a 300x150 adv banner for the sidebar, you can see it clear on non-retina desktops but blurred on the retina desktops. 

If I try and upload a 2x version of it, so a 600x300 banner for the same sidebar, you can see it clear on retina desktops but blurred on the non-retina ones. 

Same happens with the community main logo.

I'm not finding a solution but it also seems strange that it's not possibile to provide good quality images for different screens.

Any advice?