As some people have mentionned it, I figure this is the best place to ask: are a few Mura effect splotches normal on a Vita? I've had them since day 1 and only notice them on black loading screens.
it is very common if not universally experienced to varying degrees
Seriously, it's hard not to notice after you've seen it once.
I freaking hate burn-in, it's the principal reason for why I bought an LCD and not a plasma, even if the tech got better.
There's nothing on my Vita yet, but now I'll fear playing my old PSX titles in 4:3 because of them black bars.