apache and php5

[sputnik]

Hi,

my server runs openbsd 4.6 with apache unchrooted and php5 with extensions:

php5-bz2-5.2.10
php5-core-5.2.10
php5-gd-5.2.10-no_x11
php5-mbstring-5.2.10
php5-mcrypt-5.2.10
php5-mysql-5.2.10
php5-mysqli-5.2.10

I don't use the ports, i use precompiled packages. The problem is:
all php applications sometimes stops when executing some script, and gives no output, just a blank screen. For example phpmyadmin - sometimes works just fine, sometimes gives a blank screen when i'm inserting something in db table, exporting db to file, or doing something like that. Same with squirrelmail. Same with applications coded by my self. Sometimes it just needs to be refreshed, sometimes it needs to be refreshed few times, to get back interacting with application. I'm pretty sure this behaviour encounters only in 4.6 version. I had 4.5 before, and i still have one more box currently running 4.5 with apache+php5 working fine. I've tried to reinstall those packages, i've even tried to install them from ports. No result. This is really odd. Any ideas?