Lightroom 4.1 RC2 - Keep crashing

Question

I downloaded lightroom 4.1 RC2 cause the 4.0 was crashing ( randomly )....
Now i have the same problem using a SINGLE monitor with the release candidate 2 of lr 4.1...
when i change setting fastly, lightroom simply crashes.
I am seriously thinking to go back to version 3 and get a refound by adobe. My studio had to process over 3k images at day and it's impossible to work with this new version.
i am working directly to 5d mk2 cr2
My pc is a windows 7 sp1 64bit:
quad 9300
8gb ram 5-5-5-15 geil black dragon 8500
crucial m4 ssd 128gb
ati 3400 hd
dual monitor ( actually i am using one monitor cause of the known bug of crashes and wrong saturation and contrast in secondary monitor issue )

Answer 1

I am also crashing on Win7 64bit...but not just Lightroom, it actually crashes my whole machine. I'm on a fresh install of Win7 with only CS6 & Lightroom installed. Lightroom so far has been the only program to cause this, and it typically happens when I'm adjusting filters or moving sliders for example. I'm guessing it's when I'm taxing the CPU/memory a bit...However, when performing the same type of tasks in Photoshop, AE, etc., I have not experienced any crashes. I've ran some diagnostics on my memory as well as my hard drives to hopefully rule out any hardware issues, and it all seems to check out OK. Because it's crashing the whole machine, I'm unfortunately getting no feedback in the system/error logs. I'm at a loss right now, and it seems others are only having application crashes.
System specs:
Windows 7 Pro - 64bit - Service Pack 1
Intel i7 960
6GB RAM / (2) SATA III 2TB Drives
NVIDIA GeForce GTS 450 w/ Dual Monitors
CS6 Creative Cloud
Lightroom 4.0