Index: t3lib/class.t3lib_befunc.php
===================================================================
--- t3lib/class.t3lib_befunc.php	(Revision 8650)
+++ t3lib/class.t3lib_befunc.php	(Arbeitskopie)
@@ -2623,8 +2623,8 @@
 	 */
 	public static function viewOnClick($id, $backPath = '', $rootLine = '', $anchor = '', $altUrl = '', $addGetVars = '', $switchFocus = TRUE) {
 
-		$viewScriptPreviewEnabled  = '/' . TYPO3_mainDir . 'mod/user/ws/wsol_preview.php?id=';
-		$viewScriptPreviewDisabled = '/index.php?id=';
+		$viewScriptPreviewDisabled = '/' . TYPO3_mainDir . 'mod/user/ws/wsol_preview.php?id=';
+		$viewScriptPreviewEnabled = '/index.php?id=';
 		if ($altUrl) {
 			$viewScriptPreviewEnabled = $viewScriptPreviewDisabled = $altUrl;
 		}
@@ -2670,7 +2670,7 @@
 		$urlPreviewEnabled  = $viewDomain . $viewScriptPreviewEnabled . $id . $addGetVars . $anchor;
 		$urlPreviewDisabled = $viewDomain . $viewScriptPreviewDisabled . $id . $addGetVars . $anchor;
 
-		return "var previewWin=window.open(top.TYPO3.configuration.inWorkspace !== 0 && top.TYPO3.configuration.workspaceFrontendPreviewEnabled ?'" .
+		return "var previewWin=window.open((top.TYPO3.configuration.inWorkspace === 0 || (top.TYPO3.configuration.inWorkspace !== 0 && top.TYPO3.configuration.workspaceFrontendPreviewEnabled)) ?'" .
 			$urlPreviewEnabled . "':'" . $urlPreviewDisabled .
 			"','newTYPO3frontendWindow');" . ( $switchFocus ? 'previewWin.focus();' : '');
 	}
Index: typo3/js/workspacemenu.js
===================================================================
--- typo3/js/workspacemenu.js	(Revision 8650)
+++ typo3/js/workspacemenu.js	(Arbeitskopie)
@@ -152,6 +152,9 @@
 		var switchRequest = new Ajax.Request('ajax.php', {
 			parameters: 'ajaxID=WorkspaceMenu::setWorkspace&workspaceId=' + workspaceId,
 			onSuccess: function(transport, response) {
+				if (!response.setWorkspaceId) {
+					response.setWorkspaceId = 0;
+				}
 				TYPO3.configuration.inWorkspace = response.setWorkspaceId === 0 ? 0 : 1;
 
 					// first remove all checks, then set the check in front of the selected workspace