My experience with cracked hinges
I thought I'd relate my experience - purchased a 7410GX last August and have babied it. Never thought to look at the hinges until I stumbled across this thread several weeks ago.

I then took a hesitant look and found that one of the hinges had started cracking. Almost reluctantly, I contacted Gateway Tech Support and amazingly, received the shipping carton the next day. Shipped the system back on Tuesday after Memorial Day and received it Friday - amazing turnaround. I think Arima only swapped the top cover (I'm actually glad they left the screen alone as the original had no dead pixels), but I can second the earlier comment by someone who indicated that the new top panel had some mars and very faint scuff marks on it. The replacement looks a little more used than the original one, but oh well.
Also, I had to snap in two top-cover tabs on the screen which had not been fully seated - no biggie, fortunately...

Still, all-in-all, excellent customer service.