Did you use omars litestep installer and then update to the latest build of the litestep core?

Installer:
http://www.litestep.net/download.php?mod=79,module

Update:
http://www.litestep.net/download.php?mod=114,module

Dependant files if themes still dont work can be found here.
http://www.nbi-studio.com/comment.php?comment.news.14