On 26 as many users i did the firmware update on both of my x25m G2. I have win Vista x64 installed and after the update all worked fine. After two days (28 October) when i powered on my PC i saw the disk read error and the rest followed (smart went bad etc.). So it is not Win 7 related problem as i only have vista and 2 intels went bad after flashing them. It is exclusive the firmware's fault that bricked our ssds and still no word from Intel whether they will release soon a new firmware that will fix the problem or we should RMA immediate the drives (althought there is no stock, at least here in Greece to send us back).
Did you have the optimizer scheduled, or did you run it manually more than once? When you learned of the issues in Win7, did you disable the optimization schedule or did you continue to let it run?
Also - was your partition aligned or misaligned? The former would be the case if Vista created that partition; the latter would be the case if it "inherited" the partition from XP.
There's a theory that the issue is caused by optimization, and specifically only on machines that have misaligned (legacy XP) partitions. Now it's a matter of looking at those people who had failures to see what their settings were. There's a poll in these forums about that.
I didnt run the optimization because i couldnt (i had the disks on raid 0 on a perc 5i controller so no support). The initialization of the disks had be done using the Perc and the disks were running fine for about a month (till i did the firmware update).