I wanted to create my own page_not_found page for Atomik theme and so I created application/themes/atomik/page_not_found.php and set up the code for the page.
Then I got reports that the calendars had stopped showing events, though the event list was still working fine.
Investigation showed that themes/atomik/main.js was coming up ‘not found’.
It did exist in concrete/themes/atomik though not in application/themes/atomik so I assume it was trying to load it from the application area.
Did I do something wrong or is there a problem with concrete?