There is no ghosting free LCD projector around yet. I tried the new Epson and it was very very slightly better. If you must have a ghosting free projector try a DLP-projector. I had one here for a few weeks. There was no visible ghosting/crosstalk whatsoever, but the rainbow effect killed it for me. I was thinking about buying this one too and had a small preview in store. The movie was fine and ghosting was only visible, albeit clearly, on subtitles, but I also intend to play videogames with this thing and if WipeOut is so terrible already I don't know. Can you try other games too?
Maybe your glasses are malfunctioning. I think a problem with glasses is more probable than with the PJ itself, although not impossible. How is the experience in movies? I've seen Avatar and as I wrote, the movie is fine. Only subtitles made Ghosting apparent.
I would really like to know if the ghosting is already on the wall or is caused by slow glasses. Slow glasses seems unlikely seeing that DLP is free of ghosting, but with all the technological advancement in LCD chips, especially the new Epson chips being all that fast, how can there still be leftovers of the previous frames in the next one? Is it some sort of slow LCD-switching (d)efect? If the problem is caused by glasses, one can always hope for better glasses.