strange behaviour upgrade from 4.3.10 -> 5.0.3 : cgi works but apache does not

Hi, I am trying to upgrade my server from 4.3.10 to 5.0.3 without luck. The compile goes fine, I install the libphp5.so and switch the LoadModule. When I restart apache it loads fine (service httpd status) but even a simple phpInfo() call aborts. When I call the cli with the same php script, even a more complex one it works flawlessly. My ./configure (4.3.10) './configure' '--with-gd' '--with-apxs2' '--with-xml' '--with-ftp' '--enable-session' '--enable-trans-sid' '--with-zlib' '--enable-inline-optimization' '--with-mcrypt=/usr/local' '--with-imap=/usr/include/imap ' '--with-kerberos' '--with-oci8=/u01/app/oracle/product/8.1.7/' '--enable-sigchild' '--with-gettext' '--with-freetype' '--with-ttf' '--with-ftp' '--enable-ftp' '--with-jpeg-dir=/usr' '--with-mssql=/usr/local/freetds' '--with-imap-ssl=/usr/include/openssl' In php5 I've added a '--with-mysql=/usr,shared'. I've even removed the oracle (--with-oci8) but the same thing happens. Any tips ? Linux Fedora Core 1, httpd 2.0.51-1.6.legacy, mysql-devel 4.0.18