Jailbreak iOS 4.2.1 Using Redsn0w 0.9.6b4 make White Cydia Icon, Safari Crashes

Jailbreak iOS 4.2.1 Using Redsn0w 0.9.6b4 make White Cydia Icon, Safari Crashes. The rest of the devices including iPhone 3GS (old bootrom), iPhone 3G, and ipt 2G (non-MC) are lucky enough to get an untethered jailbreak. If you are seeing the symptoms of a tethered jailbreak, such as a blank Cydia icon or a crashing Safari, then here is what you need to know. After releasing iOS 4.2.1 the dev-team updated redsn0w to version 0.9.6b4 to jailbreak iPhone 4, 3GS, 3G, iPod touch 4G, 3G, 2G and iPad, I received many comments complaining about white Cydia icon and Safari crashing after jailbreaking their devices.