For some time an unwanted tiny avatar has been showing beside the author’s name within the ‘Authors’ block in the sidebar.
The widget setup panel let you to choose among 5 different avatar sizes (16×16 to 128×128 pixels) plus the ‘No Avatars’ option that actually is the one I have activated. In spite of that, an 11×11 pixels avatar is shown, linking to the author’s Gravatar profile.
Since I have this kind of feature elsewhere in the blog, I don’t want it in here.
Please note that the issue appeared after a long time of correct behaviour, and for no apparent reason.