Index: typo3/sysext/rtehtmlarea/ext_tables.php
===================================================================
--- typo3/sysext/rtehtmlarea/ext_tables.php	(revision 9332)
+++ typo3/sysext/rtehtmlarea/ext_tables.php	(working copy)
@@ -25,11 +25,13 @@
 
 		// Add contextual help files
 	t3lib_extMgm::addLLrefForTCAdescr('xEXT_' . $_EXTKEY . '_General', 'EXT:' . $_EXTKEY . '/locallang_csh.xml');
+	if (is_array($TYPO3_CONF_VARS['EXTCONF'][$_EXTKEY]['plugins'])) {
 	foreach ($TYPO3_CONF_VARS['EXTCONF'][$_EXTKEY]['plugins'] as $pluginName => $config) {
 		if ($config['contextHelpFile']) {
 			t3lib_extMgm::addLLrefForTCAdescr('xEXT_' . $_EXTKEY . '_' . $pluginName, $TYPO3_CONF_VARS['EXTCONF'][$_EXTKEY]['plugins'][$pluginName]['contextHelpFile']);
 		}
 	}
+	}
 
 		// Extend TYPO3 User Settings Configuration
 if (TYPO3_MODE === 'BE' && t3lib_extMgm::isLoaded('setup') && is_array($GLOBALS['TYPO3_USER_SETTINGS'])) {