Is this a dead pixel?
I just bought a tablet, an Acer Tab A500 16GB. I just notice that there's something strange on my tablet screen. One pixel shows strange (rainbow) color (it doesn't show the supposed color properly), just like dead pixel. The thing is it's only there when the screen is showing black color. When it's showing other color, that pixel shows color normally.
What is this? It's not dead pixel, isn't it? And is this kind of problem covered by warranty?