php creates zombie processes

Hi! unfortunately I just found out that every http query on a php file results in a zombie process like this: web10100 15582 0.3 0.0 0 0 ? Z 15:09 0:00 [php <defunct>] I just upgraded to PHP 4.3.3, but it seems not to be a specific problem due to the version. Downgrade results the same... ;-( Of course there are a lot of zombie processes after a while and I'm not so happy with them. Some information about my system: I run Apache 1.3.28 with suPHP 0.3 to be able to run PHP as a CGI version under each virtual host's user. I compiled Apache with option "LIBS=-lpthread" and PHP with "--enable-sigchild" because I read about it while searching with google. Every website works fine - up to the zombie processes... *grr* I run nearly the same system components on another server and I have no problems on it. So please can anybody help me to solve this problem? Thanks. Regards from Munich, Julian