PHP-Nuke version 8.1 has been released. Preferences administration system has been totaly re-written and reorganized, added BB2Nuke forums 2.0.21, added AutoTheme GPL edition, several security fixes, added more variables check on few modules, fixed several bugs in Topics module, added referers in abridge or unabridge modes, added function to let administrators decide if the users can change the theme or not and many more.