Just upgraded to Discourse 3.5.0.beta2-dev (ad992d7b2d).
Some unusual behaviour with user avatars, perhaps maybe only on new users, I’m still testing the scope of the issue.
Standard letter-based avatars appear correctly in various menus and category lists:
But when I click on one of the users to view their profile no image is loaded:
Then after 10 seconds or so, this icon appears:
User card is also blank:
I can replicate here on Meta too.
And: