Except for the part about "Is this rumor that I only half remember, and can't find any evidence of, true?", I'm afraid it looks like a dupe to me. If you can edit it with a source for that information and turn it into a question specifically about using whatever this new technique is, then I'd be willing to cast a reopen vote. It would also be good to include a link to other, similar questions and mention the differences with your question.
The reason for closing questions as dupes is not so much that they are exactly the same problem, but that the same solution applies. The idea is to funnel all the solution information into one place so that it is easy to find and use.
Even in this case, where you believe you've found a better solution to the old question's problem, it might be best to do as Cody suggested under Henrik's post and add your answer to the older question.