I just want to reply to parts of various posts, so I'm replying to the post that started this.
OK, my GUESS is that the problem with MBP's crashing when connected to external monitors is related to the logic board/video chip-set.
Why? 1) It seems that other posters have been able to eliminate the likelihood of this being a software problem.
2) Poster blackmade states that he tried three different adapters and all resulted in crashes. Also, when I took my MBP to the Apple "Genius" Bar, I also took in the mini-display to DVI adapter I had purchased with the laptop (from Apple), they connected it, as well as one of their own adapters, to an external monitor, but they were unable to duplicate the problem and were not prepared to let it run for possibly a few hours to recreate the problem. So they told me to return the MBP a replacement. So, to me I think that eliminates the adapter as a problem.
3) One poster, robotspacer, states that he had his logic board replaced and then had not experienced the problem after three weeks.
So . . . because I ordered my MBP on-line, I have to send it back in order to get a replacement. That means a new MBP from China with exactly the same hardware as the one I got originally and I would be willing to bet that it will have the same problem since it will be made with the logic boards/video chips as the original!
I wonder, as poster RISC_CISC asks, "Has anyone identified the same issue in their replacement units?"
I will probably send my unit back for a replacement and if I do, I'll post the results with the replacement unit.