Bug? Unable to delete all built-in host templates at once

[gospodin.horoshiy]

When I tried to delete the vast majority of host templates by selecting checkboxes next to them and cliking Delete button in Frontend I got Fatal error: Allowed memory size of 16777216 bytes exhausted (tried to allocate 16 bytes) in /home/zabbix/public_html/include/db.inc.php on line 519

Zabbix 1.6, Mysql 5, UTF-8

[Alexei]

You may consider increasing of PHP memory limit in php.ini.

[gospodin.horoshiy]

oops, sorry then)