Hostname Not Support Multi-language Character for Calculated Items in 1.8.x

[tom2sun]

Hi all,

When I create a calculated item for hostname using Chinese (UTF-8) character, the zabbix agent can't find hostname as usual, and will output:
939:20110502:171753.647 Item [Fr_鍖椾含瀹為獙瀹?To_localplus_UDP-RTT] is not supported

And then, the calculated item status is changed to "Not Supported". However, the direct SNMP item is fine.

Any suggestion?

Thanks.