What about it didn't work in bridge mode can you post more details.
Or do you mean the update failed on it?
The update did work, but the brige in 5GH did not
it connects to the main router.
I have returned to 384.5 and the brige works OK.
In summary:
384.6 router - 384.5, bridge works OK
384.6 router - 384.6, bridge DOES NOT WORK
They are two AC68U.