In case you guys haven't figured this out by now, the culprit is bad/cold solder joints, or at least in my case it was. I have a tap with the exact same symptoms as the one nat had, erratic behavior and what not. I opened it up and on a hunch I reflowed the solder on the controller ports and the molex connector where the cable plugs into. Now it works like a dream. Of course I gutted it's cord for a pce to tg-16 adapter, but I plan on wiring up a pce connector in it.