Same thing is happening to me. I've been using this keyboard for over a year now, but some keys aren't registering while some are registering as double presses. I'm from the Philippines if this matters.
Hi,
I'm from the Philippines. I bought my Poseidon Z keyboard last May 2014 and have been having the chatter and double key strokes problem recently. I already sent an email to cs2@thermaltake.com regarding this issue. Will update the RMA progress here. Thanks.