After upgrading to 3.18.1, I am encountering the following problem when a page is rendered:
Fatal error: Uncaught exception 'Exception' with message 'Unable to get valid menu entries due to database error: SQLSTATE[HY093]: Invalid parameter number: :P_permission' in /CMS/WEB/mysource_matrix/core/assets/designs/design_areas/menu/design_area_menu_type/menu_get_assets.inc:126 Stack trace: #0 /CMS/WEB/mysource_matrix/data/private/assets/design_customisation/0014/1355/design_file.php(70): menu_get_assets('left_menu_tople…', Array) #1 /CMS/WEB/mysource_matrix/core/assets/designs/design/design.inc(883): require_once('/CMS/WEB/mysour…') #2 /CMS/WEB/mysource_matrix/core/assets/designs/design_customisation/design_customisation.inc(482): Design->paint(Object(Page_Standard), Array, Array) #3 /CMS/WEB/mysource_matrix/core/include/asset.inc(4075): Design_Customisation->paint(Object(Page_Standard)) #4 /CMS/WEB/mysource_matrix/core/include/asset.inc(3993): Asset->printFrontendAsset(Object(Page_Standard)) #5 /CMS/WEB/mysource_matrix/core/include/mysource.inc(504): Asset->printFrontend() #6 /CMS/WEB/mysource_matrix/core/web/i in /CMS/WEB/mysource_matrix/core/assets/designs/design_areas/menu/design_area_menu_type/menu_get_assets.inc on line 126
Sounds like this bug: http://bugs.matrix.squiz.net/view_bug.php?bug_id=3000
3.18.2 came out this week. Upgrade to 3.18.2 to get the fix.