I have been using the dotdeb packages over at
http://www.dotdeb.org/2011/04/09/php-5-3-6-is-available/

Recently, I upgraded to PHP version 5.3.6. I have two scripts that
have worked just fine in every other 5.3.x (M|L)AMP stack but now
generate an segfault error in my /var/log/php5-fpm.log file:

WARNING: [pool *] child * exited on signal 11 (SIGSEGV) after *
seconds from start

additional .ini files parsed /etc/php5/fpm/conf.d/apc.ini, /etc/php5/
fpm/conf.d/curl.ini, /etc/php5/fpm/conf.d/gd.ini, /etc/php5/fpm/conf.d/
intl.ini, /etc/php5/fpm/conf.d/mcrypt.ini, /etc/php5/fpm/conf.d/
memcache.ini, /etc/php5/fpm/conf.d/mysql.ini, /etc/php5/fpm/conf.d/
mysqli.ini, /etc/php5/fpm/conf.d/pdo.ini, /etc/php5/fpm/conf.d/
pdo_mysql.ini, /etc/php5/fpm/conf.d/pdo_sqlite.ini, /etc/php5/fpm/
conf.d/sqlite.ini, /etc/php5/fpm/conf.d/sqlite3.ini, /etc/php5/fpm/
conf.d/suhosin.ini, /etc/php5/fpm/conf.d/xdebug.ini

;;;;;;;;;;;;;;;;;;;;;
; FPM Configuration ;
;;;;;;;;;;;;;;;;;;;;;


;;;;;;;;;;;;;;;;;;
; Global Options ;
;;;;;;;;;;;;;;;;;;

[global]

pid = /var/run/php5-fpm.pid

error_log = /var/log/php5-fpm.log

log_level = notice

emergency_restart_threshold = 0

emergency_restart_interval = 0

process_control_timeout = 0

daemonize = yes

Again, this problem didn't occur until upgrading to PHP 5.3.6. If
there a way I can get a better error message to find out what's going
on?

Thanks