Android 4.2, the latest update for the popular operating system, is experiencing numerous bug issues, including random rebooting on Nexus 7 tablets, according to various reports.

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Android 4.2 is only found on a handful of devices at this point, such as the Galaxy Nexus handsets, like the newly released LG-branded Nexus 4 smartphone from Google, as well as the Nexus 7, and 10 tablets. The version shares its Jelly Bean codename with Android 4.1, and offers only minor differences compared to that iteration, chiefly the addition of 'Gesture Typing' and a 360-degree panorama feature for the camera app. Launched only about a week ago, the Android Jelly Bean 4.2 update has seen the sort of bugs that usually accompany updating an operating system.

Based on anecdotal evidence, Nexus 7 tablet users look to be experiencing the bulk of the issues right now. There are several entries in the Android Forums about the problems associated with the latest OS reporting everything from a non-compliant document reader to diverse display quirks, and reduced app functionality. Although, the most common problem certainly looks to be the random rebooting, other problems include abrupt disruption of the Wi-Fi, sudden closure of applications, disabling of the screen rotation, brightness fluctuations, and more.

There have also been complaints of faster battery drain in some cases along with a sudden lag with the Nexus 7 that wasn't present before the update. "This is slightly similar to what was experienced by owners of the Samsung Galaxy Nexus previously when their handset kept rebooting itself without warning, and many will remember the volume bug that caused the device to suddenly go silent during a call," noted Phonesrevieew.co.uk.

Other Android 4.2 update bugs include a quirk that omits the month of December in the People app. Users who try to enter an event like a birthday or anniversary for the month of December in the People app in Android 4.2 Jelly Bean are unable to do so, as it seems Google forgot to include December in the list of months. The app shows only 11 months; and November is followed by January.

User "Rohit" on the Android Forums first reported the problem Nov. 14. Rohit found the issues on their Galaxy Nexus running Android 4.2.

"Today I was inserting birthday of a friend in my contact list so that I can sync the birthdays in my calendar. I noticed that the December month is missing. When I pressed new event the calendar came but it was not having the option for the month December. I'm using Galaxy nexus running on 4.2 jelly bean which I installed yesterday on 14 November 2012. Please help me with this as I use the calendar a lot," reported the user.

Those who want to enter in a December birthday or anniversary are out of luck since the app skips right over December and moves from November to January. The problem does not affect the Android 4.2 calendar app.

Another common complaint is the inability to focus around the screen and flickering of the screen, according to PC-Tablet.com.

Lucky for Android 4.2 users, "Google has acknowledged the problem and said that it is working on a fix. We suspect that fix, pushing the OS to Android 4.2.1, will be out shortly," said Pocket-Lint.com

Of course, not everyone has seen their update accompanied by buggy performance issues. Some users are reporting no issues at all with their device at all after updating. So, "the problems may be related to certain apps installed on the tablet conflicting with the operating system," posits Phonesreview.co.uk.

Other than these Andorid 4.2 bugs, the Nexus 7 has been enjoying a hugely successful 2012. Along with the LG Nexus 4 smartphone and the Nexus 10, the device sold out within minutes of its debut on the Google Play store. ASUS CFO David Chang reported that the tablet started off selling 500,000 units per month and eventually moved up to 1 million this past month.

Have you experienced any of these issues while updating your device to Android 4.2? Was your update bug free? Let us know in the comments.