Dear opensuse users!

I have a question regarding of installation of on opensuse 10.2 box
somehow I get stuck in second step under 'System compatibility' after I hit refresh button I get following notice in my apache logs POST /shop/install/model.php HTTP/1.1 500 -
any ideas?
Is opensuse 10.2 blocking something? I managed to install Joomla, Drupal, ZenCart.. without any problems..