Let's discuss the new A10 BIOS for the X51. I'm sure there's lots of eager people who want to know what problems this fixes and I think it would be good for Dell/Alienware Engineers to be able to see what problems people were having/are having before and after the update.
This isn't about complaining, or yelling at Dell Chris, or OMG iH8 Dell, etc, etc. Please just tell us what issues you had prior to A10, what you were running before, and what your experiences are with A10 now installed.
I'm hoping by us helping give this info to Dell in an organized manner we can expedite the solutions to some of the issues I know a lot of us X51 owners are experiencing.
It's an awesome machine and I love it to bits and I want it to perfect and I know Dell is working on resolving issues. Let's help em out. I'll start.
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Previous BIOS: A07
Installation Method: From Factory
Issues: Windows 7: none that I recall! Windows 8 Pro 64-bit: Sleep/Wake issue.
Issue Detail: Attempting to put machine into sleep state but it never fully enters sleep mode. Side lights remain on. Unresponsive to keyboard/mouse events. Power button must be held for at least 3 seconds, then pushed again to wake machine from sleep.
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If there's any more information I can provide, I will be more than happy to tell you what I know! I hope other X51 owners can share their experiences with A10 so we can make the inevitable next BIOS update a real bug crusher! 
Tyler