Ctrl-shift-eject will reset the screen and stop the flicker temporarily.
As a person who spends about $4-10K personally on Apple products per year, and authorizes about $350,000 in corporate purchases, I am getting sick and tired of the shoddy quality in the past few years.
It is getting worse and worse. Cool innovation without quality build isn't worth squat. I hope someone at Apple with power understands this.
Get used to it. As Jobs is going away, the quality of Apple products has only one direction to take. As they are slowly yet steadily expanding their market, pressure would mount to start making cheaper products with shorter life cycle (~2y). Or in other words: market of companies making products with long life cycle (~5y) is shrinking and marginalizing, as hardware more and more looses its relevance to connected services.
(Bad car analogy: old cars could last 15-25 years, new cars lasts top 10 years. Because safety standards and fuel economy classes change too often, it make no sense now to invest into development of car which can last 25y. And competition made sure that there would be no turning back.)
I personally bought UMBP17 as my last Apple products - solely because I do not expect that Jobs now (even if he stays with Apple) would be able to keep products at the level of quality many of us got used to. Without influence of Jobs, Apple's management would unlikely be capable to fend off stockholders who unconscious push company to become another Dell. Without Jobs, there would be no dictator setting/maintaining high engineering standards inside the company.