Thanks for the tip. About 90 minutes ago I powered off the unit and unplugged it for about two minutes. I didn't do a factory reset in it but I'm happy to say the problem hasn't returned since. I did go into my PS3 system menu and turned off HDMI control, which may have contributed to the problem initially.
It's too early for real judgement, but I will say that I'm really liking what I'm seeing for the most part and it looks like it will be a nice upgrade from the X55.
I haven't really noticed any image pumping although I do notice on complete fade to blacks there is a very slight delay between the fade to black and the clamp down on the iris a few tenths of a second after that take it to complete black, which is cool. This is running out if the box right now with the lens aperture in auto 1.
I will say that the unit definitely seems brighter than my X55 (even factoring in the new bulb vs. the bulb with 950 hours), but in full disclosure my X55 had been out of the house for two months now.
I don't have dedicated calibration gear at the moment so I'll look to others for measurements and general accuracy of the profiles, gamma, etc. I hope to get it calibrated one the bulb gets some hours on it.
For reference, I'm projecting onto a 130" wide (141.3" diagonal) Seymour AT screen at a throw distance of just over 15' from the screen. This puts regular 16:9 screen size at ~113". Given the larger 2.35 image size with zooming, I've needed every lumen I can get. Room is a bat cave...