Index: t3lib/class.t3lib_div.php
===================================================================
--- t3lib/class.t3lib_div.php	(revision 7737)
+++ t3lib/class.t3lib_div.php	(working copy)
@@ -5897,19 +5897,22 @@
 			if($quoteActive > -1)	{
 				$paramsArr[$quoteActive] .= ' '.$v;
 				unset($paramsArr[$k]);
-				if(preg_match('/"$/', $v))	{ $quoteActive = -1; }
+				if (substr($v, -1) === $paramsArr[$quoteActive][0]) {
+					$quoteActive = -1;
+				}
 
 			} elseif(!trim($v))	{
 				unset($paramsArr[$k]);	// Remove empty elements
 
-			} elseif(preg_match('/^"/', $v))	{
+			} elseif (preg_match('/^(["\'])/', $v) && substr($v, -1) !== $v[0]) {
 				$quoteActive = $k;
 			}
 		}
 
 		if($unQuote) {
 			foreach ($paramsArr as $key => &$val) {
-				$val = preg_replace('/(^"|"$)/','',$val);
+				$val = preg_replace('/(^"|"$)/', '', $val);
+				$val = preg_replace('/(^\'|\'$)/', '', $val);
 			}
 		}
 		// return reindexed array
Index: t3lib/class.t3lib_stdgraphic.php
===================================================================
--- t3lib/class.t3lib_stdgraphic.php	(revision 7737)
+++ t3lib/class.t3lib_stdgraphic.php	(working copy)
@@ -2673,7 +2673,7 @@
 				$frame = '';
 			}
 
-			$cmd = t3lib_div::imageMagickCommand('convert', $params . ' ' . $this->wrapFileName($input) . $frame . ' ' . $this->wrapFileName($output));
+			$cmd = t3lib_div::imageMagickCommand('convert', $params . ' ' . $this->wrapFileName($input . $frame) . ' ' . $this->wrapFileName($output));
 			$this->IM_commands[] = array($output,$cmd);
 
 			$ret = exec($cmd);