I am having this issue as well and without doing anything... simply reading this thread, the keys fixed themselves. I didn't do anything. But I am sure it will come back at some point because it seems to come and go.
It's always that same row involving the F6 key, Page Up Y H B etc... it doesn't seem to want to display blue color which affects its RGB properties and displays the wrong colors.
Has anyone figured out a fix for this or am I just stuck with a crappy keyboard?