GRKERNSEC_PROC & munin

I've enabled GRKERNSEC_PROC and GRKERNSEC_PROC_USERGROUP with
GRKERNSEC_PROC_GID [=10] but not GRKERNSEC_PROC_USER.  When I try to
run the netstat plugin for munin, I get an error:

# munin-run netstat
cannot open /proc/net/snmp: No such file or directory

even though I do have the file:

# ls -l /proc/net/snmp
-r--r--r-- 1 root wheel 0 Jun 19 09:40 /proc/net/snmp

munin-run is run as root and I have 'user root' and 'group root' in
/etc/munin/munin-node.conf so I don't see why munin-run can't find
/proc/net/snmp.  Is this problem related to grsec?

- Grant