Index: t3lib/class.t3lib_tceforms.php
===================================================================
--- t3lib/class.t3lib_tceforms.php	(revision 5165)
+++ t3lib/class.t3lib_tceforms.php	(working copy)
@@ -1593,6 +1593,20 @@
 				// If there is an icon for the selector box (rendered in table under)...:
 			if ($p[2] && !$suppressIcons && (!$onlySelectedIconShown || $sM))	{
 				list($selIconFile,$selIconInfo)=$this->getIcon($p[2]);
+				
+					// generate thumb?
+				if (isset($PA['fieldConf']['config']['makeThumb'])) {
+					if (isset($PA['fieldConf']['config']['thumbSize'])) {
+						$size = t3lib_div::trimExplode('x', $PA['fieldConf']['config']['thumbSize']);
+						$selIconInfo[3] = 'width="' . $size[0] . '" height="' . $size[1] . '"';
+					} else {
+					    $selIconInfo[3] = 'width="56" height="56"';
+					} 
+					$selIconFile = $this->backPath . 'thumbs.php?dummy=' . $GLOBALS['EXEC_TIME'] . '&file=' . rawurlencode($selIconFile) . '&size=' . 
+						(isset($PA['fieldConf']['config']['thumbSize']) ? $PA['fieldConf']['config']['thumbSize'] : '') .
+						'&md5sum=' . t3lib_div::shortMD5(basename($selIconFile).':'.filemtime($selIconFile).':'.$GLOBALS['TYPO3_CONF_VARS']['SYS']['encryptionKey']);			
+				}
+				
 				$iOnClick = $this->elName($PA['itemFormElName']) . '.selectedIndex=' . $c . '; ' . 
 					$this->elName($PA['itemFormElName']) . '.style.backgroundImage=' . $this->elName($PA['itemFormElName']) . '.options[' . $c .'].style.backgroundImage; ' .
 					implode('',$PA['fieldChangeFunc']).$this->blur().'return false;';