Not sure if this is worth noting on my end, however, I'm also experiencing the exact same issue after update 2016.10.17 with one major difference. I'm running IPMI Tools in unRAID 6.2.1 on two servers but only one server is having the issue.
Server A with this board: SUPERMICRO MBD-X11SSL-F-O is having the issue and I keep getting this error in my syslog: Oct 19 22:54:17 Tower kernel: ipmi_si IPI0001:00: Error clearing flags: cc. Also, "IPMI-SENSORS" will not run from the command line. There is an error that states that the ipmi.sensors.config file cannot be found. I've attached the log for more details.
Server B with board: SUPERMICRO MBD-X10SLL-F-O is working just fine after update 2016.10.17.
The SUPERMICRO IPMI admin tools shows all sensors green and active
I was helping someone with 6.1 but initially set the Max for freeipmi to 6.1 which didn't work because it's 6.1.9. So I changed it to Min 6.1 but forgot the Max which then installed the wrong version on 6.2. I only updated the plg file. So it's possible depending when you updated one server got the broken 10.17 plg.
Anyway I pushed an update for the plugin and it should work now.
That fixed it. Thanks.