After some poking around on the internet, I made the following discovery:
The Henson Stitch was apparently originated on the planet Mars. Cryptoplanetologist Richard Hoagland recently un"earthed" retouched NASA photos that reveal the presence of an invisible stitch on the infamous "Face of Mars". After running the photo through 30 different filters, and superimposing elements of the Zapruder film onto it, and calculating the square root of the sum of 33 degree Masons at Jim Henson Productions, the stitch was clear as day.
Seriously ... the Henson Stich is as elusive as Bigfoot, Nessie and Elvis put together. If it were real it would either be patented or widely disseminated.
It's an urban legend. Like how I lost my kidney in South America last year. (Incidently, whoever did it stitched me up with the Henson Stitch.)
What I want to know is how they hid marionette strings pre-cgi in the bicycle sequences (Muppet Movie & Great Muppet Caper.)
-- Scraps "wild-eyed conspiracy theorist" Flippy