[quotet]a problem with a connection to the DB.[/quote]
Thanks for the tip. When I opened the siti.ini.php file, I noticed that it was pointing to the wrong database (don't know why, though). After having set it straight manually, it's now up and running.
I am experiencing the same problem. However, both site.ini and site.ini.php are pointing to the correct database, which I can easily connect to via commandline. Moreover, the ezpublish setup also connected to the database without any problems.