diff -ru /Users/lars/Sites/typo3_src/typo3_src-4.2.7/typo3/sysext/setup/mod/index.php /Users/lars/Sites/typo3_src/typo3_src-4.2.7patched/typo3/sysext/setup/mod/index.php
--- index.php	2009-07-02 08:02:05.000000000 -0500
+++ index.php	2009-07-02 21:08:42.000000000 -0500
@@ -270,7 +270,7 @@
 		global $BE_USER,$LANG,$BACK_PATH,$TBE_MODULES;
 
 			// file creation / delete
-		if ($this->isAdmin) {
+		if ($GLOBALS['BE_USER']->isAdmin()) {
 			if (t3lib_div::_POST('deleteInstallToolEnableFile')) {
 				unlink(PATH_typo3conf . 'ENABLE_INSTALL_TOOL');
 			}
@@ -575,7 +575,7 @@
 		);
 
 			// Install Tool access file
-		if ($this->isAdmin) {
+		if ($GLOBALS['BE_USER']->isAdmin()) {
 			$installToolEnableFileExists = is_file(PATH_typo3conf . 'ENABLE_INSTALL_TOOL');
 			$installToolEnableButton = $installToolEnableFileExists ?
 				'<input type="submit" name="deleteInstallToolEnableFile" value="' . $LANG->getLL('enableInstallTool.deleteFile') . '" />' :