10.7.3 Screen flashes then shutdown...And KP's

2010 i5 MBP with 8GB Crucial ram....In January I began getting random shut-downs...The screen would go garbled, then flash 2-3 times, then the computer would shut down...Has happened somewhat infrequently until this week...Happened 4 times on Tuesday and 3 times today...
I've been reading about the black screen issues on these models running Lion, but I havent seen anyone else complain of the screen going nuts then instant shut-down...While searching I found the support topic on Kernel Panic...I've never had a KP occur, but while actually reading about KP on the support page, it happened. I removed and reseated the RAM,and was ok for 2 days...But then today Ive crashed multiple times and had another KP. Im currently running memtest, which so far says RAM is ok...My next step is to do a hardware test, but I dont have my access to my install disks until tomorrow...The flash and crash occurs at random times and in random apps, but the KP's have occured when Safari was the only app open....
Im wondering if this crashing is a hardware problem related to the graphics? Im currently running wth graphics switching disabled to see if the problem occurs again. What other steps can I take to eliminate possible causes? If there a way, other than disabling graphics switching, to narrow down a cause to the Intel graphics or the logic board?

Completed the hardware test this AM, and it reported no problems...I have no beeps during boot...It did beep upon the first KP...It was a series of 3 beeps, but it was unexpected, and I cant tell your if it was just 3 repeating beeps, or if it was the SOS code...It hasnt beeped since that first KP...Ive looked through Console and found the logs...Most of it is Chinese to me, cant really tell much from them.....At this point I guess Im another victim of the graphics switching driver crash problem...Hopefully Mountain Lion fixes this, if theres no update sooner...

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