Index: t3lib/class.t3lib_stdgraphic.php
===================================================================
--- t3lib/class.t3lib_stdgraphic.php	(revision 8197)
+++ t3lib/class.t3lib_stdgraphic.php	(working copy)
@@ -2322,7 +2322,8 @@
 					if (!$data['origH']) { $data['origH'] = $data[1]; }
 					$offsetX = intval(($data[0] - $data['origW']) * ($data['cropH']+100)/200);
 					$offsetY = intval(($data[1] - $data['origH']) * ($data['cropV']+100)/200);
-					$params .= ' -crop '.$data['origW'].'x'.$data['origH'].'+'.$offsetX.'+'.$offsetY.' ';
+					// option to remove empty canvas for transparent graphics is inverted in im6 vs. im4 (gm always crops)
+					$params .= ' -crop '.$data['origW'].'x'.$data['origH'].'+'.$offsetX.'+'.$offsetY.($this->im_version_4?' ':'! ');
 				}
 
 				$command = $this->scalecmd.' '.$info[0].'x'.$info[1].'! '.$params.' ';