configuration -> items / triggers list not shown

if i want to list items or triggers in configuration -> hosts -> items / triggers, i get following error in the httpd error.log:
[Fri Oct 14 13:15:04 2011] [error] [client 10.150.32.1] PHP Fatal error: Unsupported operand types in /var/www/html/zabbix/include/triggers.inc.php on line 1126, referer: http://zabbix.bwin.func/hosts.php?sid=2cfbca7b075dbc19