[collectd] ping_droprate/ping_stddev images missing

[Steffen Sledz]

We use collection.cgi (collectd 4.10.1, Ubuntu 11.04) to display some ping statistics.

The ping images itself are shown well, but the ping_droprate/ping_stddev images are missing. There are just emtpy boxes inside the table. :(

The RRD files below /var/lib/collectd/ all exist and seem to be OK. The ping plugins uses the default settings (just MaxMissed is set to 3).

What's wrong here?

Steffen