samba - Dec 2013 - CTDB: public addresses not longer available?

Hi,

I have a strange problem with our CTDB cluster:
 From time to time all(!) public IP addresses are not reachable, although ctdb
status and ctdb ip are ok and
log files (/var/log/messages and ctdb.log) seems to be ok.
Also the outputs of "ip route" and "ip rule" are fine.

All other IP addresses on alle nodes are working fine, just the IPs managed by
CTDB are not working. A restart
of ctdb service does not solve the problem. Only a reboot seems to be a
solution...

Used CTDB version: 1.0.114.7-1

Is it a known problem? Does somebody has an idea?

Thanks!
Alex