Index: wp-admin/includes/template.php
===================================================================
--- wp-admin/includes/template.php	(revision 16110)
+++ wp-admin/includes/template.php	(working copy)
@@ -804,8 +804,8 @@
 	$units = array( 0 => 'B', 1 => 'kB', 2 => 'MB', 3 => 'GB' );
 	$log = log( $bytes, 1024 );
 	$power = (int) $log;
-	$size = pow(1024, $log - $power);
-	return $size . $units[$power];
+	$size = pow( 1024, $log - $power );
+	return round( $size, 2 ) . $units[$power];
 }
 
 /**