Hi,

went to profile settings
changed language to english
clicked 'edit avatar'
uploaded image 1
refreshed the page
clicked 'edit avatar'
clicked delete avatar in pop up box
chose image 2
clicked save
page refreshed with image 1
clicked 'edit avatar'
pop up box shows image 2

Ok I just did exactly the same procedure on this mylittle forum which is running 2.3.5 and the problem does not exist, the avatar changes no problem like it did before 2.3.7

Okay, I did it in the same way (without changing the language). I upload a new image and close the popup window. I saw my new avatar on my profile. I refresh my profile via [ctrl] + [F5] and via [ctrl]+[shift]+[R] (windows system) and my new avatar is still shown. I click on 'edit avatar' and the popup shows my new avatar, too.

I think that kind of proves it

No, it works as expected. Again, you have to clean-up your browser cache.

/Micha

P.S. Your current avatar is a dog on my page