Can you elaborate on the problems that shielding can create? I have a lot of extenders out there running over shielded cat6 and would like to know what pitfalls to consider when troubleshooting. (In case it's relevant, all cables are homerunned direct from TX to RX without patch cables.)

UPDATE: I just read instructions for using shielded cable with Control4 HDMI gear. They say to terminate one side "normally" (i.e. without connecting the shield or ground wire) and to terminate the other side such that the ground wire is connected to earth ground. It doesn't matter which side you choose to ground.