now I have a problem with viewing items in Omeka public site.
In my installation of Omeka there are currently about 700 uploaded jpg pictures described with DC metadata. They could be seen in admin interface, but not on public site - http://oziz.ffos.hr/omeka/
More precisely, they could also be seen on a public site but only after I log in to admin site and after that when I go back to public site items are visible.
As if by logging at admin site of Omeka I woke up the part of system in charge for displaying items in public site.