Redsn0w 0.9.6 has updated to 0.9.6rc12. It fixes the bugs in last release RC11. This RC 12 is released to fix any lingering issues with the boot animation and also it fixes the unwanted options enabled in settings.
If you rely on unlocking then you it is not for you. You should use sn0wbreeze 2.5 for custom boot logo animation in your jailbroken iDevice.
Download Redsn0w 0.9.6rc12 for Windows
Download Redsn0w 0.9.6rc12 for Mac OS X