Jelly Bean Android 4.2 is Google's latest operating system. But the operating system is attacked by a bug that makes it behave strangely.

Quoted from ZDNet, Wednesday (21/11/2012), the bug is to make devices that use the Android 4.2 Jelly
Bean can not set a birthday in December. But reportedly, Google is now trying to fix it.

This bug affects the People app in Android 4.2, a result in December so it can not be found when entering calendar events in the contact details. These improvements will likely bring up the update version 4.2.1.

As is known, handheld devices are currently using Android 4.2 is the Nexus 4, another series of Galaxy Nexus and Nexus tablet 7.

This is a continuation Android version 4.1 and offers only slight differences when compared with previous versions. In summary, the addition of these features only on Gesture Typing and panoramic images for a camera application.

may be useful ..