For those who don't want to read the whole explanation, my 8600 problems derive from a most likely faulty heatsink/fan (the most likely consensus reached by many a friend, tech, FAQ, and myself).
A few related i8600 posts: http://www.notebookforums.com/showthread.php?t=58241http://www.notebookforums.com/showthread.php?t=92946
I sent my old 8100 in for repairs at the end of its warranty a year ago, for just "3-5 days" of service. After 2 months of Dell employees telling me "oh it's in the shop still," "oh, it's been sent out, here is the tracking number [insert fake tracking number here]," they finally admitted "we don't have it" and replaced it with an Inspiron 8600. I can't say I was displeased at getting this, but I've been getting so much crap from this 8600 that it's not even funny.
There are a few threads that discuss the main problem, and that, depending on where you look, is either described as heat (caused by faulty design, a faulty heatsink, a faulty fan...the explanations are endless) or abrupt and unexplainable video slowdowns. I used to play BF1942 back in the day on my 8100's MR7500. If I start it today, then within three minutes it's framerate will drop to virtually nothing, literally less than 1 FPS. Perfectly smooth on max video settings, max bots, max bot-cpu time, everything. Then nothing. I can also turn everything down to the absolute lowest. Same thing.
The severity varies. Some games drop from ~100 to ~10, others from ~60 to ~15, but it happens in just about any game imaginable from the past half decade.
Dell has been absolutely NO help in fixing the problem, and I'm sure you've all had your horror stories with their "#1 support," so I won't bother getting into it.
Bottom line? Yes. I've had problems. My 8600 for one, is sucking a major load.