Web Server locks up because of PHP

I'm having a serious problem with my PHP4.0.0 installation on Linux 2.2.13 i686 (Linux Slackware 7), Apache/1.3.12. PHP is loaded as a module and the Apache server is compiled with mod_so. Previously this site was running fine using PHP4RC1, but now, attempts to access certain pages lock up the web server after displaying only a portion of the page causing it to be unresponsive for several minutes. During this time CPU is idle and everything else seems to behave normally. An example of this is the phpinfo page and the error messages that apache is logging are below. While viewing the phpinfo.php page, the entire thing displays properly, but the ZEND logo that normally displays appears to be what hangs the sever though this might be a red herring. I admit that I don't even have the foggiest clue as to what the problem is. Could there be a compile directive I missed? I compiled it the exact same way that I compiled PHP4RC1 so I don't understand what could have gone wrong. Apache error_log below: ---- session.c(1239) : Freeing 0x0824F0EC (5 bytes), script=/usr/local/apache/default_html/phpinfo.php mod_files.c(206) : Freeing 0x08234CCC (5 bytes), script=/usr/local/apache/default_html/phpinfo.php session.c(1248) : Freeing 0x082E3574 (2 bytes), script=/usr/local/apache/default_html/phpinfo.php session.c(1250) : Freeing 0x0829F614 (8 bytes), script=/usr/local/apache/default_html/phpinfo.php session.c(1241) : Freeing 0x08238454 (1 bytes), script=/usr/local/apache/default_html/phpinfo.php session.c(1245) : Freeing 0x082D4E34 (1 bytes), script=/usr/local/apache/default_html/phpinfo.php session.c(1249) : Freeing 0x08292004 (15 bytes), script=/usr/local/apache/default_html/phpinfo.php zend_hash.c(185) : Freeing 0x082E6D94 (20 bytes), script=/usr/local/apache/default_html/phpinfo.php Last leak repeated 1 time session.c(1240) : Freeing 0x082E7284 (10 bytes), script=/usr/local/apache/default_html/phpinfo.php mod_files.c(198) : Freeing 0x0825CED4 (16 bytes), script=/usr/local/apache/default_html/phpinfo.php session.c(738) : Freeing 0x082AAB84 (33 bytes), script=/usr/local/apache/default_html/phpinfo.php mod_files.c(132) : Freeing 0x08257B4C (33 bytes), script=/usr/local/apache/default_html/phpinfo.php ---- John Lange