My similar tale involves a broken left shift key, a user who didn't touch-type 
and a password with a '!' in it. (It worked for me, but when he sat in the same 
seat to log in with the same password, he couldn't get in.)

-Luke

On Jun 22, 2013, at 4:14 PM, Tom Limoncelli <[email protected]> wrote:

> Have you heard about the keyboard that only worked when you were sitting down?
> 
> http://netlib.bell-labs.com/cm/cs/pearls/sec0510.html
> or
> http://webcache.googleusercontent.com/search?q=cache:VH59EeSTs7UJ:netlib.bell-labs.com/cm/cs/pearls/sec0510.html+&cd=1&hl=en&ct=clnk&gl=us
> 
> BEGIN QUOTE
> That attitude is illustrated in an anecdote from IBM's Yorktown
> Heights Research Center. A programmer had recently installed a new
> workstation. All was fine when he was sitting down, but he couldn't
> log in to the system when he was standing up. That behavior was one
> hundred percent repeatable: he could always log in when sitting and
> never when standing.
> 
> Most of us just sit back and marvel at such a story. How could that
> workstation know whether the poor guy was sitting or standing? Good
> debuggers, though, know that there has to be a reason. Electrical
> theories are the easiest to hypothesize. Was there a loose wire under
> the carpet, or problems with static electricity? But electrical
> problems are rarely one-hundred-percent consistent. An alert colleague
> finally asked the right question: how did the programmer log in when
> he was sitting and when he was standing? Hold your hands out and try
> it yourself.
> 
> The problem was in the keyboard: the tops of two keys were switched.
> When the programmer was seated he was a touch typist and the problem
> went unnoticed, but when he stood he was led astray by hunting and
> pecking. With this hint and a convenient screwdriver, the expert
> debugger swapped the two wandering keytops and all was well.
> END QUOTE
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