If you have a PS3 running version 3.55 there’s currently no way to JB the system other than to downgrade to a different FW, however doing so will disable blu-ray support….Until Now…
For now, GeoHot gives us the only real way to JB a 3.55 PS3…however, it appears now that he’s under watch and has been served papers by SCEA (Sony) and his site is down. Fortunately for us, David S. Touretzky of Carnegie Mellon University in Pittsburgh, PA has stepped in to help fight the power that is Sony. Mr. Touretzky is well known in freedom of information circles and was greatly involved in the DVD DeCSS case (DeCSS allows us to copy DVDs or to rip them to portable, digital media).
Instructions, files, links are all after the button.