I'm pretty fussy and expect near-perfection with anything I buy, but some people seem to obsess in looking for something wrong. If you've been using it for a few weeks and don't see any problems, then why intentionally try to find them? Granted, if there is a issue in functionality that you might have missed, it's worth giving it a quick check, but if you haven't noticed any unevenness or graininess in the display, why make yourself unhappy by trying to find an issue with it now?
I've cursed myself like this before. I've owned something for a long time, never had a problem with it, then someone will mention a "known defect" and upon closer examination, I find mine also has the "problem". From that point on, it's in the back of my mind, nagging me - even though I was always perfectly happy with it before.
When I got my new MBP C2D, I gave it a once (or twice) over. I was very observant the first couple of weeks to make sure that everything was in top shape. The screen looks great, the lid closes flush, it's cool as a cucumber, it doesn't make any strange noises, etc. I see no need to create artificial conditions in hopes of finding a problem ;-)
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