Upgrade from 3.0.4.x to 3.0.5 will break ispconfig setup if php-process module is missing.
As described in http://www.howtoforge.com/forums/showthread.php?p=293380 Upgrade from 3.0.4.x to 3.0.5 will break ispconfig setup if php-process module is missing. Setup should check fo rthat module and stop if it is not present.
[root@s1 www]# /usr/bin/php -q /usr/local/ispconfig/server/server.php 06.03.2013-00:03 - DEBUG - Set Lock: /usr/local/ispconfig/server/temp/.ispconfig_lock 06.03.2013-00:03 - DEBUG - Found 368 changes, starting update process. 06.03.2013-00:03 - DEBUG - Calling function 'update' from plugin 'shelluser_base_plugin' raised by event 'shell_user_update'. PHP Fatal error: Call to undefined function posix_getgrnam() in /usr/local/ispconfig/server/plugins-available/shelluser_base_plugin.inc.php on line 165