Just today I noticed that it is possible to click on the user picture (e.g. here: https://stackoverflow.com/users/22656/jon-skeet).
I had the feeling that there is some more functionality behind but it seems it just simply links to the profile page and in the case of StackOverflow it links to the very same page. So it results in a refresh of that page. On other communities it links to the activity tab of the user.
I personally was confused and I would suggest to remove the link if I am not mistaken by the meaning of this link.
Similar but not the same issue: Why do Stack Exchange sites add a hyperlink inside H1 tag, pointing to the same page?