Index: t3lib/class.t3lib_stdgraphic.php
===================================================================
--- t3lib/class.t3lib_stdgraphic.php	(Revision 6947)
+++ t3lib/class.t3lib_stdgraphic.php	(Arbeitskopie)
@@ -2657,13 +2657,28 @@
 	 * @param	string		The relative (to PATH_site) image filepath, input file (read from)
 	 * @param	string		The relative (to PATH_site) image filepath, output filename (written to)
 	 * @param	string		ImageMagick parameters
-	 * @param	string		Refers to which frame-number to select in the image. '' or 0 will select the first frame, 1 will select the next and so on...
+	 * @param	int		Optional, Refers to which frame number to select in the image, starting with
+	 *				"0" as the first frame. If no frame number is given, the parameter is omitted.
+	 *				 If a PDF is used as input file and no frame is used, it will always set the frame parameter
+	 * 						
 	 * @return	string		The result of a call to PHP function "exec()"
 	 */
-	function imageMagickExec($input,$output,$params,$frame = 0)	{
-		if (!$this->NO_IMAGE_MAGICK)	{
-			$frame = $frame ? '['.intval($frame).']' : '';
-			$cmd = t3lib_div::imageMagickCommand('convert', $params.' '.$this->wrapFileName($input).$frame.' '.$this->wrapFileName($output));
+	function imageMagickExec($input, $output, $params, $frame = -1) {
+		if (!$this->NO_IMAGE_MAGICK) {
+
+			$frame = intval($frame);
+				// if a PDF is used as the input file, a frame number must always be added
+				// to select the first page of the PDF
+			if (strtolower(substr($input,-3)) == 'pdf') {
+				$frame = '[' . ($frame > 0 ? $frame : '0') . '] ';
+				// add the frame number only if there is a frame used (starting by frame 0), add the frame
+			} else if (!$this->noFramePrepended && $frame >= 0) {
+				$frame = '[' . $frame . '] ';
+			} else {
+				$frame = ' ';
+			}
+
+			$cmd = t3lib_div::imageMagickCommand('convert', $params . ' ' . $this->wrapFileName($input) . $frame . $this->wrapFileName($output));
 			$this->IM_commands[] = array($output,$cmd);
 
 			$ret = exec($cmd);