Index: src/wp-admin/includes/dashboard.php
===================================================================
--- src/wp-admin/includes/dashboard.php	(revision 42388)
+++ src/wp-admin/includes/dashboard.php	(working copy)
@@ -689,11 +689,18 @@
 
 		<li id="comment-<?php echo $comment->comment_ID; ?>" <?php comment_class( array( 'comment-item', wp_get_comment_status( $comment ) ), $comment ); ?>>
 
-			<?php echo get_avatar( $comment, 50, 'mystery' ); ?>
+			<?php 
+			$show_avatars  = get_option( 'show_avatars' );
+			$show_avatars_class = '';
+			if ( 1 == $show_avatars ) {
+				echo get_avatar( $comment, 50, 'mystery' );
+				$show_avatars_class = 'dashboard-comment-wrap '; 
+			}
+			?>
 
 			<?php if ( ! $comment->comment_type || 'comment' == $comment->comment_type ) : ?>
 
-			<div class="dashboard-comment-wrap has-row-actions">
+			<div class="<?php echo $show_avatars_class;?>has-row-actions">
 			<p class="comment-meta">
 			<?php
 				// Comments might not have a post they relate to, e.g. programmatically created ones.