Index: branches/5.2.x/core/units/helpers/image_helper.php
===================================================================
--- branches/5.2.x/core/units/helpers/image_helper.php
+++ branches/5.2.x/core/units/helpers/image_helper.php
@@ -490,8 +490,8 @@
 					$ratio = min($width_ratio, $height_ratio);
 				}
 
-				$width = ceil($orig_width * $ratio);
-				$height = ceil($orig_height * $ratio);
+				$width = (int)round($orig_width * $ratio);
+				$height = (int)round($orig_height * $ratio);
 			}
 			else {
 				$width = $orig_width;