Agreed. I find that not many people post their avatar/profile picture up until after they have been a member for a while. This might encourage them to upload one sooner and thus making their posts have a more aesthetically pleasing look than just the default avatar.
PS. Wow this is actually a really old thread...now I feel bad for replying.
I also see that it does not show in "Recent Activity" when user has deleted his Avatar.
So sometimes I have a new user uploading his image, then a few minutes later he deletes his image.
Then when looking at the "Recent Activity" it says: "user xyz has a new Avatar".
But there is actually no Avatar showing as the user has deleted his Avatar.... ?