Has anyone had any experience using HDMI fiber optic converters/extenders? I have a weird ground loop problem in my system which I traced back to my HTPC. I get hum whenever I join the grounds between ...

When I move my mouse around, scroll, etc. an annoying clicking/buzzing (not a 60 cycle hum) that occurs through my powered speakers (KRK Monitors). Really - it's horribly annoying and not at all ...