I don't know - my other ALPS boards don't cause any problems, neither do my Cherry boards.
Also I mentioned the WPM simply because that is what you do on a keyboard: type words.
This is the only way for me to explain the problem since other boards (besides the SGI 101AT which blocks almost all my bottom row keys at 115 WPM) do not give me any problems at the same WPM rate, measured with the same software and on the same setup.
I find this a much more fitting explanation of the problem (especially for people new to the keyboard business) rather than explaining about actual rollover/scanrate tests ala rolling a credit card over the keys. I personally could not care less if I can roll a credit card over six keys as long as I can type on the board fine at my usual speed.
Well sixty, I agree, we type words, as far as our daily usage of the board goes, it makes sense. However, not all typists are created equal. Two people may average 115WPM, but one person's max might be 130, while the second person's might be 180. This is the point I'm making. If you're going to quote a number, it's helpful to be detailed in this respect.
I've tried all the tests people have presented on geekhack, and I'm unable to see transposition on the Zero under any circumstances that could be replicated by my hands in an activity akin to actually typing.
(I apologize to the OP, someone hijacked the thread and now I have to weigh in, lest I miss the opportunity in an unfair battle. Feel free to e-mail me with any questions you have. ALSO, if you buy a Zero and have an issue with it you're only SOL if you void your warranty like Wellington did)
See, even if you "roll" your favorite words at a rate of 200WPM, which might be beyond the known scanrate of the keyboard you're using, then the case for transposition is still difficult because of a couple factors:
1. In order for a transposition to occur, the intended key presses must be opposite of the default scanning order; i.e. if K is scanned before O, then you need to type "OK" within the scanning period to see a transposition. So you first need to know the default order of the keys you believe were transposed.
2. You need to know the scanning technique that is being used; i.e. are all rows scanned at once every 100ms, or are the rows scanned individually, each in sequence every 10ms (assuming 10 rows)? The complete board scan in both cases is 100ms, but one of these techniques is much more likely to create transpositions.
The only thing you can prove without knowing 1 and 2 is superstition at best. Yes, you may not see the same issue on another board, but if you're looking for an issue or have any kind of prejudice/bias/foreknowledge, then you're stuck with a psychological hurdle.