Wow, here's a blast from the past! I still had this thread marked for e-mail notifications and was very surprised to see one pop up this morning! :laughing:
I contacted Corsair Support and went through the whole "hard firmware reflash" process with them as Inheritance suggested but unfortunately nothing we tried there made any difference. Long story short, in the end I just had to send it back and get a replacement, which then worked perfectly - third time lucky, I guess!
Although it didn't work for me, I would still suggest contacting Corsair for the firmware reflash in the first instance; no point going through the hassle of replacing the whole keyboard if you don't have to. Unfortunately for me, the latter was the only option I had left.
Oh and just a thought: if one of your keys is lighting in a different colour to all the others, I'm now just wondering whether you might be able to use CUE to set that key in a different colour, which the keyboard might then display as more accurate to what you want. Not an ideal situation and I guess it could take a lot of time to experiment with it for something that's not even guaranteed to work, but I'm just throwing it out there.
Sorry I can't be more help than that, guys. Like I said, my third keyboard ended up working fine, so I'm sure there are "correct" ones out there.