While moving all my sites to Apache2 and PHP4.4 on a Debian server, I ran into a few problems. Not sure why, though.
All pages on all blogs came up blank and there was absolutely nothing in the Apache error log.
A test showed that the server returned zero bytes.
I ran the install.php script again, and it said
Your PHP version does not have support for MySQL :(
but phpmyadmin worked brilliantly, so MySQL was supported.
Anyway, after some experimenting, I added the line
to /etc/php4/apache2/php.ini, restarted the web server and Nucleus worked again. I wonder why phpmyadmin worked anyway.
Update: it is in the Debian BTS.