I find a lot of websites with wonky looking Gravatars on hover. I've written about it at http://salferrarello.com/round-gravatar-hovercard-problem/. The following code when pasted into the Google Chrome Developer Tools console, will trigger the hover state so you can modify the CSS.

trigger-gravatar-hover-state.js

(function() {
  
  var gravCloneHtml;
  
  jQuery('.grav-hashed').first().trigger('mouseenter');
  
  gravCloneHtml = jQuery('.grav-clone-a')[0].outerHTML;
  
  setTimeout( function() { 
    jQuery('.grofile').trigger('mouseleave'); 
  }, 3000 );
  
  setTimeout( function() {
    jQuery('body').append( gravCloneHtml ); 
  }, 4000 );
}) ();