The recent update released that actually caused a Windows BSOD isn't the first time nor the last. There's bound to be more coming in future.
It happened with the release of Windows XP SP2 on Intel "Prescott" CPUs, and I've heard mention of infinite reboot issues with Vista SP1 on certain computers.
Modern operating systems are massively complex pieces of software. The fact that Microsoft's OS is apparently convoluted merely exacerbates the problem. Even Apple's Mac OS X isn't immune from security or stability issues. Same goes for Linux.
Occasional blips happen to the best of software. The point is to minimise them so the end user doesn't see them so often.
Business as usual. Move along.