http://www.zabbix.com/documentation/1.8/manual/web_interface/administration#scripts claims that the only supported macros are

{HOST.CONN}

,

{HOST.DNS}

and

{IPADDRESS}

that is not correct, as

{HOSTNAME}

is supported as well.
thus this issue is to review & update supported macro information.

i tried to look at that myself in the source but failed