Well, no… you said in your original post that you’d updated to 1.06.15, so if you’re running that firmware, USB keyboards are supported.
I was merely answering as to whether USB keyboards were available under the original firmware.
I think we’re getting mixed up at the word “original”. I was referring to how the box shipped from the factory. I believe you mean official WD firmware as opposed to WDLXTV.
Yes, any official WD firmware from 1.04.10 onwards, should support keyboards in one form or another.
(For that matter, since the flashable WDLXTV firmwares are only based on 1.02x and 1.03x, you wouldn’t nominally be able to use a keyboard if you were to flash with the third-party firmware, unless B-Rad added keyboard support to that revision-- I haven’t read all his release notes to know which releases may support keyboards and which ones may not.)