simplest script:
<?
$id = sem_get(0xff03e3);
sem_acquire($id);
?>

modules:
'./configure' '--with-apxs=/usr/local/apache/bin/apxs' '--with-mysql' '--enable-sysvsem' '--enable-sysvshm' '--enable-track-vars' '--enable-sockets'

description:
When i run that script for the first time, warning doesnt appear, as it is described in manual. All the other calls hang apache processes without any chance for semaphore to unlock.
However, if i try such variant:

<?
set_time_limit(0);
$id = sem_get(0xff03e3);
sem_acquire($id);
sleep(1);
sem_release($id);
?>

everything works perfectly for single calls, but when I run my crash-test, which calls the php script 200 times at once, it hangs the semaphore again and many apache processes stay frozen.

I think, the reason is incorrect request finalization.