I noticed the ghosting too when I went to my AT&T store to see the Titan II in person. I think it's just what the Super LCD tech does. I noticed the ghosting on my HD7 too. I guess it wasn't such a big deal until I started using my Nokia Lumia 900 with an AMOLED screen. No ghosting compared to Super LCD Tech.
I had the same problem with HTC Mozart.
Was perfect and suddenly there was A LOT of ghosting.
I changed the brightness level in low or full, dont remember and that fixed the problem immediately.