When I hide the block "Navigation" I get the following error message:

Notice: Undefined index: navigation in include() (line 43 of /Users/raphaelduerst/Sites/michel/sites/all/themes/corporateclean/page.tpl.php).

I attached a patch which should fix the bug.

CommentFileSizeAuthor
corporateclean-navigation.patch601 bytesRaphael Dürst