I have a configurable reports block on a Moodle front page. Only administrators can see it. There is nothing in the block permissions to stop other people seeing it, it's not "hidden", and deleting it and replacing the block doesn't change it's non-appearance. Doing a "check permissions" check for an affected user returns a "yes" "allowed" value for "view block".
There appears nothing in the site's "configurable reports" or "front page" settings to hide it either.
Where might the appropriate setting be?