[Q] Unable to Root after 4.2.2 update

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http://forum.xda-developers.com – Hey guys, my first post here. I signed up for this forum a little while ago and I've just been a lurker since today. Lots of great stuff on this forum! I finally got my Nexus 4 phone when they went back on sale in late January, I came from an iPhone 3GS and I've been loving the switch every day since! But now I have a problem that I hope you guys can help me with. When I first got my phone the first thing I did was unlock the bootloader and root the device, I had 4.2.1 on my phone and forced the 4.2.2 update by clearing the cache/data of a few apps when it was mentioned on this for (HowTos)