Ouch, that would be quite noticeable. The slight green tint or fringe is on the right side of the screen, just barely there, running from top to bottom. I also kept my old buld, I have not tried putting it back in to see if the problem somehow comes from a new bulb, I will do that at some point.
If you keep the bulb, you can just buy a new light and keep the housing, saving about $100. I found a source on Amazon selling the bulb. Didn't buy one, the first bulb lasted almost 6 years.
Not sure what to do about this, love the set, fits the room well. Hate to see it go bad, might not for years yet to come. Sorry to see Sony exit the rear projection market.