You can now chose if you wish to see images containing partial or full nudity.
If your filter is on then images marked as 'Adult Content' will be covered in the various pages: Voting, Ranking, Profile, Winners, Discover.
Pressing 'Show' will only remove the filter from a specific image - refreshing the page or leaving it will add the filter back.
How to mark a photo as 'Adult Content':
How to change your permanent viewing preference for 'Adult Content':