undefined symbol: _zval_dtor

[Ryan Ollerenshaw]

Warning: dl() [function.dl]: Unable to load dynamic library
'/usr/lib/php/modules/php_mapscript.so' -
/usr/lib/php/modules/php_mapscript.so: undefined symbol: _zval_dtor in
/usr/local/gmap-ms46/htdocs/phpinfo_mapscript.php on line 26

the php_mapscript.so library does not seem to be loading correctly, any help
would be great.

Apache/2.2.0 (Fedora) Core 5
PHP 4.4.2
Mapserver 4.8.3