I'm using the most recent versions of Drupal, Views and Taxonomy Treemenu. The taxonomy treemenus are generating successfully, using the default view (taxonomy_router_term). I'm having problems accessing the content when I'm NOT logged in as admin. I'm using the default view (taxonomy_router_node) and access is set to unrestricted. The 'authenticated user' (which I understand is everyone that is not logged in?) gets Fatal error: Cannot use string offset as an array in /sites/all/ modules/taxonomy_treemenu/taxonomy_treemenu.module on line 2367 whereas the admin user gets to see the content. If I give the authenticated user 'Administer Nodes' permissions I do not get the error and I do see the content, however that means that anyone can create content, which is not what I want. Interestingly applying all create, delete, edit permissions (but NOT administer nodes) brings back the error. This is the code. case "taxmenu/%/node/%/%": //Treemenus have no node links. To control exansion, we target the //parent tid link. $item['href'] = 'category/' . $item['page_arguments'][0] ['vid'] . $item['page_arguments'][1]['parent_path']; break; Specifically, line 2367 is $item['href'] = 'category/' . $item['page_arguments'][0] ['vid'] . $item['page_arguments'][1]['parent_path']; Logged in as admin $item['page_arguments'] returns: Array ( [0] => Array ( [menu_name] => menu-ol-hlp [title] => Online Help [description] => Jane Systems online help [vid] => 13 [tid] => 0 [options] => a:3:{s:6:"filter";a:0:{}s:6:"fields";a:0:{}s: 4:"sort";a:1:{s:3:"nid";a:1:{s:5:"order";s:3:"ASC";}}} ) [1] => Array ( [0] => Array ( [tid] => 55 [title] => System Setup ) [1] => Array ( [tid] => 68 [title] => Authorisation Centre ) [parent_path] => /55/68 ) [2] => 25 ) But when I'm not logged in I get a:3:{i:0;i:1;i:1;i:3;i:2;i:4;} I can see that $item['page_arguments'] isn't being turned into an array, but I can't see why. I've been trying to trace back $router_items to see how it gets generated, but I can't seem to find it. I'd really appreciate any help. Thanks