(Possible Bug?) Copying items gives me a strange error message

[freak]

Hi,

when copying (for example) net.if.in[eth0,bytes] and net.if.out[eth0,bytes] from Template_Linux to an empty new template, I get this error message:

# array_search() [<a href='function.array-search'>function.array-search</a>]: Wrong datatype for second argument[/var/www/zabbix/include/items.inc.php:197]
# Array to string conversion[/var/www/zabbix/include/db.inc.php:457]
# Invalid argument supplied for foreach()[/var/www/zabbix/include/items.inc.php:301]
# Added new item test:net.if.in[eth0,bytes]

Is this some escaping issue?

Greetings
Sebastian