I just tried it with one of my A4+ and it bricked the box.  I performed the upgrade through the GUI as one normally would, but upon the automatic restart, it wouldn't come back up.  Couldn't even ping the box.  I walked over to the unit and saw that all lights were off on the hashoard with the fault red light on the controller.  I power cycled (i figured it was safe to since it was about 30 mins since the upgrade ended) all the lights came back on as one would expect.  After about 2 mins of sitting there, all the hasboard lights turned off.  My guess is that the controller upgrade failed and now is corrupted.

Will need to run out and grab a tfcard from the store to see if upgrading via the slot works.  for now, i'll switch all the hasboard cables over to another miner so I don't lose hashrate.  Definitely hold back on the new firmware...let some guinea pigs try it for several weeks first.  Don't get burned like I did.

Before this, had upgraded to 0129 with no issues and running several weeks.