Hi. i report a tiny bug ^^ . my english is bad so a give you a example.
User1 upload a avatar [avatarUser1]
User1 and User2 are friend (display in newsfeed)
[avatarUser1] [avatarUser2]
1 week later...
User1 changer his avatar [avatarUser1²]
So [avatartUser1] is deleted. And in the newsfeed all old messages with the old avatar [avatarUser1] have a blank avatar.
Sorry but it's hard to explain :/