During my latest DH game, one of my players became concerned when he noticed that the Adepts has access to the Electro Graft Use talent. He was under the impression that Electro Grafts were exclusive to the Mechanicus (due to it being listed under the Mechanicus Implant package) and its lack of availability anywhere else as a career path option or implant purchase. In fact, until I examined the errata, Tech-priests didn't even get Electro Graft Use. Interestingly enough, though the Adept gets the Talent Electro Graft Use, they do not get the implant. And though the Talent in Dark Heresy does not require the implant, the Talent in Rogue Trader does.
I'm curious if other groups noticed this and if they had issues with the exclusivity perception of the implants and the availability of the talent and how they handled it or would handle it.