tried these fixes as well, and they do not work for me either.
Now when I try to restart apache, i get the following message:
service httpd restart
Stopping httpd: [FAILED]
Starting httpd: [Sat Mar 23 15:23:51 2013] [warn] NameVirtualHost *:8080 has no VirtualHosts
(98)Address already in use: make_sock: could not bind to address [::]:8080
[ OK ]
it shows it started OK, but really it doesn't. The FAILED appears after having already restarted it once.
I saw this after I updates the 000-ispconfig.vhost and the db_mysql_inc.php file manually, and reinstalling the stable version again did not fix it either.
php version is php-5.3.3-22.el6.x86_64 on a CentOS 6.3 unit fully updated.