Index: typo3/mod/tools/em/class.em_index.php
===================================================================
--- typo3/mod/tools/em/class.em_index.php	(revision 5105)
+++ typo3/mod/tools/em/class.em_index.php	(working copy)
@@ -2921,7 +2921,18 @@
 				$cells[] = '<td nowrap="nowrap">'.
 				($this->typePaths[$extInfo['type']] && @is_file($fileP)?'<a href="'.htmlspecialchars(t3lib_div::resolveBackPath($this->doc->backPath.'../'.$this->typePaths[$extInfo['type']].$extKey.'/doc/manual.sxw')).'" target="_blank"><img src="oodoc.gif" width="13" height="16" title="Local Open Office Manual" alt="" /></a>':'').
 				'</td>';
-				$cells[] = '<td nowrap="nowrap">'.$this->typeLabels[$extInfo['type']].(strlen($extInfo['doubleInstall'])>1?'<strong> '.$GLOBALS['TBE_TEMPLATE']->rfw($extInfo['doubleInstall']).'</strong>':'').'</td>';
+				
+				// double installation
+				$doubleInstall = '';
+				if (strlen($extInfo['doubleInstall']) > 1) { 
+					$doubleInstallations = array();
+					for ($i = 0; $i < strlen($extInfo['doubleInstall']); $i++) {
+						$doubleInstallations[] = str_replace(array('S', 'G', 'L'), array('System', 'Global', 'Local'), $extInfo['doubleInstall']{$i}); 
+					}
+					$doubleInstallTitle = implode(' installation overridden by ', $doubleInstallations) . ' installation';
+					$doubleInstall = ' <strong><abbr title="' . $doubleInstallTitle .'">' . $GLOBALS['TBE_TEMPLATE']->rfw($extInfo['doubleInstall']) . '</abbr></strong>';
+				}
+				$cells[] = '<td nowrap="nowrap">' . $this->typeLabels[$extInfo['type']] . $doubleInstall . '</td>';
 			} else {	// Listing extensions from REMOTE repository:
 				$inst_curVer = $inst_list[$extKey]['EM_CONF']['version'];
 				if (isset($inst_list[$extKey]))	{