In the weeks following the game's release, some users reported on community forums that levels they had created had been taken down for "moderation", and were no longer available to play. A representative from Sony stated that once a level is flagged by players using the in-game "Good Grief" system, levels were reviewed by a moderator and only removed if deemed inappropriate. On 11 November 2008, SCE confirmed that around 200 levels —less than 0.5 per cent of levels published — had been removed, the majority of which contained obscenity, while the rest were removed due to copyright violations. Media Molecule acknowledged there were issues with the moderation system and released an update in December to help rectify them. In addition to an on-screen message, users are notified with a PSN message when a level they have published is removed, along with information on the reason for its removal. They can play and edit the level themselves whether on or offline. The developers have clarified the rules regarding what is and are not appropriate and have made several changes "behind the scenes" which they hope will "alleviate most of the issues that creators have experienced."