Hi,
munin-graph fails to graph the quota-usage_ plugin. The reason is that it can not calculate the name of the RRD file for the "root" user:
2009/12/10 16:40:13 [DEBUG] Processing field "root" [root].
2009/12/10 16:40:13 [DEBUG] service Services :: foo.bar :: quota_usage_datavg_public_lpds has 24 elements.
2009/12/10 16:40:13 [DEBUG] RRD name / filename: root / /var/lib/munin/--g.rrd
2009/12/10 16:40:13 [DEBUG] Field name after cdef set to cdefroot
[...]
2009/12/10 16:40:13 [RRD ERROR] Unable to graph /var/cache/munin/www/Services/foo.bar/quota_usage_datavg_public_lpds-month.png : opening '/var/lib/munin/--g.rrd': No such file or directory
The name of the RRD file looks correct for all the other users.
Gabor