Very odd stuff...
I updated to this firmware about a week or so ago. Today my network is down and I can't ping the router (normally at 10.0.0.1).
Do a release/renew and get a 192.168.1.x IP address and log into the router at 192.168.1.1. For some reason the configuration has been restored to defaults AND the firmware has reverted back to the original version (1.1.28.146072).
HOW DOES THAT HAPPEN?
Anyhow, I've updated the firmware again, and restored my last config backup and everything seems fine.