Recently after changing the IP address of several ESX hosts I was experiencing a problem with HA on one of them. Looking in the event log I was getting the following error “Configuration of host IP address is inconsistent on host” after a lot of troubleshooting I found the FT_Hosts still had the old IP’s. After updating this file all sprung into life.
I have since found this post by Duncan Epping that would have helped considerably at the time http://www.yellow-bricks.com/2008/06/04/changing-the-ip-address-of-an-esx-host-and-ha/
Virtualised Reality 
Thanks for this – have had exactly the same problem with all of my clustered hosts after changing the Service Console addresses, and this was the first link google came up with – great!
Your welcome Mark glad the blog was of use 😀