just upgraded from MKD9.1 to mdk 10 Official and I can't get apache working!

the /var/log/httpd/error_log says:

[Sun Apr 25 10:10:58 2004][notice] Digest: generating secret for digest authentication ...
[Sun Apr 25 10:10:58 2004] [notice] Digest: done
[Sun Apr 25 10:10:59 2004] [emerg] (13)Permission denied: couldn't grab the accept mutex
[Sun Apr 25 10:10:59 2004] [emerg] (13)Permission denied: couldn't grab the accept mutex
[Sun Apr 25 10:10:59 2004] [emerg] (13)Permission denied: couldn't grab the accept mutex
[Sun Apr 25 10:10:59 2004] [notice] Apache-AdvancedExtranetServer/2.0.48 (Mandrake Linux/6mdk) mod_perl/1.99_11 Perl/v5.8.3 auth_mysql/1.11 mod_ssl/2.0.48 OpenSSL/0.9.7c DAV/2 PHP/4.3.4 configured -- resuming normal operations
[Sun Apr 25 10:10:59 2004] [alert] Child 18035 returned a Fatal error...
Apache is exiting!
[Sun Apr 25 10:10:59 2004] [emerg] (22)Invalid argument: couldn't grab the accept mutex
MKD9.1 to mdk 10 Official and I can't get apache working!

My apache version is:

apache2-2.0.48-6mdk
apache2-mod_auth_mysql-2.0.48_1.11-1mdk
apache2-mod_perl-2.0.48_1.99_11-3mdk
apache-conf-2.0.48-2mdk
apache2-common-2.0.48-6mdk
apache2-mod_cache-2.0.48-6mdk
apache2-mod_proxy-2.0.48-6mdk
apache2-mod_php-2.0.48_4.3.4-1mdk
apache2-manual-2.0.48-6mdk
apache2-mod_dav-2.0.48-6mdk
apache2-modules-2.0.48-6mdk
apache2-mod_disk_cache-2.0.48-6mdk
apache2-mod_ssl-2.0.48-6mdk

Please anyone, what does "Permission denied: couldn't grab the accept mutex" mean?

cheers,
tord