The iPhone Dev Team has just pushed out an update to its Redsn0w and PwnageTool jailbreak utilities for iOS 4.3.3. Redsn0w rc16 and PwnageTool 4.3.3.1 address the side vibration/ringer switch issue for iPhone 4 and iPhone 3GS owners. The bug is only present on iOS 4.3.3 jailbroken devices.
The bug fix was found by famous iPhone hacker @i0n1c and he doesn't even have an iPhone. For those of you that have already updated to iOS 4.3.3 and jailbroken your iDevice using redsn0w rc15 or PwnageTool 4.3.3, you can install this fix simply by running redsn0w rc16 over your existing 4.3.3 jailbreak. Just uncheck the “Install Cydia” option and check any other options you want. Simple as that...