Index: typo3/mod/tools/em/class.em_index.php
===================================================================
--- typo3/mod/tools/em/class.em_index.php	(revision 3975)
+++ typo3/mod/tools/em/class.em_index.php	(working copy)
@@ -249,6 +249,7 @@
 		'experimental' => 'Experimental',
 		'test' => 'Test',
 		'obsolete' => 'Obsolete',
+		'write_protected' => 'Writeprotected'
 	);
 
 	/**
@@ -261,6 +262,7 @@
 		'experimental' => '#007eba',
 		'test' => '#979797',
 		'obsolete' => '#000000',
+		'write_protected' => '#cf7307'
 	);
 
 	/**
@@ -896,9 +898,14 @@
 								if ($inst_list[$extKey]['type']!='S' && (!isset($inst_list[$extKey]) || $this->versionDifference($version,$inst_list[$extKey]['EM_CONF']['version'],$this->versionDiffFactor)))	{
 									if (isset($inst_list[$extKey]))	{
 											// update
-										$loc= ($inst_list[$extKey]['type']=='G'?'G':'L');
-										$aUrl = 'index.php?CMD[importExt]='.$extKey.'&CMD[extVersion]='.$version.'&CMD[loc]='.$loc;
-										$loadUnloadLink.= '<a href="'.htmlspecialchars($aUrl).'"><img src="'.$GLOBALS['BACK_PATH'].'gfx/import_update.gif" width="12" height="12" title="Update the extension in \''.($loc=='G'?'global':'local').'\' from online repository to server" alt="" /></a>';
+										if ($inst_list[$extKey]['EM_CONF']['state'] != 'write_protected') {
+											$loc= ($inst_list[$extKey]['type']=='G'?'G':'L');
+											$aUrl = 'index.php?CMD[importExt]='.$extKey.'&CMD[extVersion]='.$version.'&CMD[loc]='.$loc;
+											$loadUnloadLink.= '<a href="'.htmlspecialchars($aUrl).'"><img src="'.$GLOBALS['BACK_PATH'].'gfx/import_update.gif" width="12" height="12" title="Update the extension in \''.($loc=='G'?'global':'local').'\' from online repository to server" alt="" /></a>';
+										} else {
+												// extension is marked as write protected
+											$loadUnloadLink.= '<span style="background-color:#cf7307;color:#fff;padding:2px;" title="write protected">WP</span>';
+										}
 									} else {
 											// import
 										$aUrl = 'index.php?CMD[importExt]='.$extKey.'&CMD[extVersion]='.$version.'&CMD[loc]=L';
@@ -927,13 +934,13 @@
 					$content.= '<form action="index.php" method="post" onsubmit="'.htmlspecialchars($onsubmit).'"><label for="_lookUp">List or look up <strong'.($this->MOD_SETTINGS['display_unchecked']?' style="color:#900;">all':' style="color:#090;">reviewed').'</strong> extensions</label><br />
 							<input type="text" id="_lookUp" name="_lookUp" value="'.htmlspecialchars($this->listRemote_search).'" /> <input type="submit" value="Look up" /></form><br /><br />';
 
- 					$content .= $this->browseLinks();
+					$content .= $this->browseLinks();
 
 					$content.= '
 
 					<!-- TER Extensions list -->
 					<table border="0" cellpadding="2" cellspacing="1">'.implode(chr(10),$lines).'</table>';
- 					$content .= '<br />'.$this->browseLinks();
+					$content .= '<br />'.$this->browseLinks();
 					$content.= '<br /><br />'.$this->securityHint;
 					$content.= '<br /><br /><strong>PRIVACY NOTICE:</strong><br /> '.$this->privacyNotice;
 
@@ -945,7 +952,7 @@
 					if (count($this->inst_keys))	{
 						reset($this->inst_keys);
 						while(list($extKey)=each($this->inst_keys))	{
- 							$this->xmlhandler->searchExtensionsXML($extKey, '', '', true);
+							$this->xmlhandler->searchExtensionsXML($extKey, '', '', true);
 							if((strlen($this->listRemote_search) && !stristr($extKey,$this->listRemote_search)) || isset($this->xmlhandler->extensionsXML[$extKey])) continue;
 
 							$loadUnloadLink = t3lib_extMgm::isLoaded($extKey)?
@@ -1794,7 +1801,7 @@
 					// Read uploaded file:
 				if (!$uploadedTempFile)	{
 					if (!is_uploaded_file($_FILES['upload_ext_file']['tmp_name'])) {
- 						t3lib_div::sysLog('Possible file upload attack: '.$_FILES['upload_ext_file']['tmp_name'], 'Extension Manager', 3);
+						t3lib_div::sysLog('Possible file upload attack: '.$_FILES['upload_ext_file']['tmp_name'], 'Extension Manager', 3);
 
 						return 'File was not uploaded?!?';
 					}
@@ -5300,7 +5307,7 @@
 	function showExtensionsToUpdate() {
 		global $LANG;
 		$extList = $this->getInstalledExtensions();
-
+		 
 		$content = '<table border="0" cellpadding="2" cellspacing="1">'.
 		'<tr class="bgColor5">'.
 			'<td></td>'.
@@ -5312,7 +5319,7 @@
 			'<td>'.$LANG->sL('LLL:EXT:lang/locallang_mod_tools_em.xml:tab_mod_comment').'</td>'.
 		'</tr>';
 
-		foreach ($extList[0] as $name => $data)	{
+		foreach ($extList[0] as $name => $data)	{     debug($data);     
 			$this->xmlhandler->searchExtensionsXML($name, '', '', false, true);
 			if (!is_array($this->xmlhandler->extensionsXML[$name]))	{
 				continue;
@@ -5363,7 +5370,7 @@
 					}
 				}
 				$content .= '<tr class="bgColor4"><td valign="top">'.$icon.'</td>'.
-'<td valign="top"><a href="?CMD[importExtInfo]='.$name.'">'.$data[EM_CONF][title].'</a></td>'.
+'<td valign="top">' . ($data['EM_CONF']['state'] == 'write_protected' ? '<span style="color:#cf7307">' . $data['EM_CONF']['title'] . ' (write-protected)</span>' : '<a href="?CMD[importExtInfo]='.$name.'">'.$data[EM_CONF][title].'</a>') . '</td>'.
 '<td valign="top">'.$name.'</td>'.
 '<td valign="top" align="right">'.$data[EM_CONF][version].'</td>'.
 '<td valign="top" align="right">'.$lastversion.'</td>'.