Weird behaviour with ssh monitoring

[batosai]

Hi,

I just setup Zabbix 1.6.5 monitoring with Debian hosts. I used Debian testing repositories.
All hosts display the following error :
"Sshd is not running on XXX"

# ps -ef | grep sshd
root      9812     1  0 Aug29 ?        00:00:01 /usr/sbin/sshd

The service is viewed as UP by item "net.tcp.service[ssh]"

For testing purpose, I downgraded client to 1.4.6 (the version in Debian Stable) and the error disappeared.

Any idea what could cause this ?