I just did a kernel update (from the cr repo - newer kvm and kernel) on my centos 5 host and rebooted everything, now after fresh reboot I cannot access the graphical console on some of the VPSes. I get an error like: "VNC has been configured on this system by Cloudmin, but the VNC server on port 5909 on host system is not accessible. If it was just enabled, the system will need to be rebooted before VNC is available."
If I issue a reboot from the "System state" section it fixes the problem, but it means that VPS was just rebooted 2 times.
Any ideas how to avoid this in the future?