[CentOS] cluster.conf validating, but cman not starting

Tue Jun 5 19:30:21 UTC 2012
Dirk <dirk.schulz at kinzesberg.de>

Hi all,

since the last yum update cman does not start any more with the 
following entries in /var/log/messages:

> Jun  5 20:50:39 pclus1cent6-02 corosync[1852]:   [MAIN  ] Corosync 
> Cluster Engine ('1.4.1'): started and ready to provide service.
> Jun  5 20:50:39 pclus1cent6-02 corosync[1852]:   [MAIN  ] Corosync 
> built-in features: nss dbus rdma snmp
> Jun  5 20:50:39 pclus1cent6-02 corosync[1852]:   [MAIN  ] Successfully 
> read config from /etc/cluster/cluster.conf
> Jun  5 20:50:39 pclus1cent6-02 corosync[1852]:   [MAIN  ] Successfully 
> parsed cman config
> Jun  5 20:50:39 pclus1cent6-02 corosync[1852]:   [MAIN  ] parse error 
> in config: parse error in config: .
> Jun  5 20:50:39 pclus1cent6-02 corosync[1852]:   [MAIN  ] Corosync 
> Cluster Engine exiting with status 8 at main.c:1680
But the cluster config is okay:
> [root at pclus1cent6-02 ~]# ccs_config_validate
> Configuration validates
Before the last yum update the cluster config was okay, cman started. 
The config has not been changed.

Has anyone run into this problem? Even disabling config validation in 
/etc/sysconfig/cman does not change this behaviour.

I am lost, and my cluster does not start. Any hint or help is highly 
appreciated.

Dirk