I am having similar problems...running Apache 2.0.4, PHP 5.0.4, & MySql 4.1.20. My errors show this: [quote]PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/modules/dom.so' - /usr/lib/php/modules/dom.so: undefined symbol: htmlCreateMemoryParserCtxt in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/modules/soap.so' - /usr/lib/php/modules/soap.so: undefined symbol: xmlBufferCreateStatic in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/modules/xsl.so' - /usr/lib/php/modules/xsl.so: undefined symbol: dom_node_class_entry in Unknown on line 0[/quote] I also have the following installed: php-dba 5.0.4 php-devel 5.0.4 php-gd 5.0.4 php-imap 5.0.4 php-ldap 5.0.4 php-mbstring 5.0.4 php-mcrypt 5.0.4 php-mhash 5.0.4 php-mysql 5.0.4 php-ncurses 5.0.4 php-odbc 5.0.4 php-pear 5.0.4 php-pgsql 5.0.4 php-smnp 5.0.4 php-soap 5.0.4 php-xml 5.0.4 php-xmlrpc 5.0.4 This is driving me crazy!! The only other thing I have noticed is that my php/session directory is not writeable from my Joomla installation...could that be a source of the problem?