The init scripts für zabbix_agentd included with source for SUSE are out of date and conflicts with default configuration. This effects e.g.:

current init script: ZABBIX_BIN="/opt/zabbix/sbin/zabbix_agentd"
current default config: ZABBIX_BIN="/usr/local/sbin/zabbix_agentd"
current init script: ZABBIX_PID="/var/tmp/zabbix_agentd.pid"
current default config: ZABBIX_PID="/tmp/zabbix_agentd.pid"
current init script: CONFIG_FILE="/etc/zabbix/zabbix_agentd.conf"
current default config: CONFIG_FILE="/usr/local/etc/zabbix_agentd.conf"

This should be resynchronized again.