Hello,
I have noticed that when saving in the profile, the avatar was re-created from the one installed. This is annoying because the compression is applied another time on the image and this gives a bad image at the end and moreover my first image in 256x256 was 18Kb, the second one was 44Kb.
Here is the result of my profile being saved 4 times without modifying the image :
/httpdocs/images/avatar/size-256/lqa86hvz5a6b8e6k0isdjmvup.jpg.jpg.jpg.jpg
/httpdocs/images/avatar/size-256/lqa86hvz5a6b8e6k0isdjmvup.jpg.jpg.jpg
/httpdocs/images/avatar/size-256/lqa86hvz5a6b8e6k0isdjmvup.jpg.jpg
/httpdocs/images/avatar/size-256/lqa86hvz5a6b8e6k0isdjmvup.jpg
I guess there is a bug there.