diff --git a/src/applications/diffusion/controller/DiffusionBlameController.php b/src/applications/diffusion/controller/DiffusionBlameController.php
--- a/src/applications/diffusion/controller/DiffusionBlameController.php
+++ b/src/applications/diffusion/controller/DiffusionBlameController.php
@@ -118,10 +118,6 @@
         $author_phid = $commit->getAuthorDisplayPHID();
       }
 
-      if (!$author_phid && $revision) {
-        $author_phid = $revision->getAuthorPHID();
-      }
-
       if (!$author_phid) {
         // This means we couldn't identify an author for the commit or the
         // revision. We just render a blank for alignment.
@@ -137,6 +133,7 @@
         $author_meta = array(
           'tip' => $handles[$author_phid]->getName(),
           'align' => 'E',
+          'size'  => 'auto',
         );
       }
 
diff --git a/src/applications/repository/phid/PhabricatorRepositoryIdentityPHIDType.php b/src/applications/repository/phid/PhabricatorRepositoryIdentityPHIDType.php
--- a/src/applications/repository/phid/PhabricatorRepositoryIdentityPHIDType.php
+++ b/src/applications/repository/phid/PhabricatorRepositoryIdentityPHIDType.php
@@ -30,6 +30,7 @@
     array $handles,
     array $objects) {
 
+    $avatar_uri = celerity_get_resource_uri('/rsrc/image/avatar.png');
     foreach ($handles as $phid => $handle) {
       $identity = $objects[$phid];
 
@@ -40,6 +41,7 @@
       $handle->setName($name);
       $handle->setURI($identity->getURI());
       $handle->setIcon('fa-user');
+      $handle->setImageURI($avatar_uri);
     }
   }