Hi,
updated as normal following the instructions in the wiki entry - woa, woa and thrice woa !
nothing worked properly - could not start the service, etc.
Googled around a bit and found that there is an issue with some CentOS based builds - reputably fixed in the beta 7.7.1.
Downloaded this, yum localinstall and now all working again - go figure ...
Just in case this helps anyone else ..
NWJ