I have just installed munin-node from the base repo on Fedora 14 and then started it. I found that my munin server is not able to collect data from this node so I tried connecting via telnet to test. When connecting via telnet I see that no plugins are listed:

[dave@host ~]# telnet localhost 4949
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
# munin node at host.example.com
list

quit
Connection closed by foreign host.
[dave@host ~]#

I did not modify anything after the installation. The munin-node.conf is allowing connections from 127.0.0.1 and the default set of plugins in /etc/munin/plugins/ are symlinked to the plugins in /usr/share/munin/plugins/.

Here is the working output of the telnet test of the 'list' command should look like (this is on a Fedora 13 host):

[dave@www ~]$ telnet localhost 4949
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
# munin node at www.example.com
list
apache_accesses apache_processes apache_volume cpu df df_inode entropy forks fw_packets if_err_eth0 if_err_eth1 if_eth0 if_eth1 interrupts iostat iostat_ios irqstats load memory munin_stats mysql_ mysql_bytes mysql_innodb mysql_queries mysql_slowqueries mysql_threads netstat open_files open_inodes postfix_mailqueue postfix_mailvolume proc_pri processes swap threads uptime users vmstat yum
quit
Connection closed by foreign host.
[dave@www ~]$

Edited to show output of munin-node-configure:

[root@host ~]# munin-node-configure
Plugin                     | Used | Extra information
------                     | ---- | -----------------
acpi                       | no   |
amavis                     | no   |
...
http_loadtime              | no   |
if_                        | yes  | eth1 eth0
if_err_                    | yes  | eth0 eth1
ifx_concurrent_sessions_   | no   |
interrupts                 | yes  |
...
uptime                     | yes  |
users                      | yes  |
varnish_                   | no   |
vserver_resources          | no   |
yum                        | yes  |
zimbra_                    | no   |

Any suggestions on what to check next?