And then you apply it in testing, note the regression, and either don't apply it in production or apply it as you push out an update.

Do you control all the processors your customers use?

If the software will be running on the machines of "customers" and you do not "control all the processors" they use, then you're not in the "sometimes" I was discussing above.

That was what I was trying to say, somehow badly I guess.

Yeah, I certainly didn't want to give the impression it was a common situation, just that it totally does happen.

Do you have an example of this happening?