Nvidia has started pushing out a new update to its Shield and Shield K1 tablets. Listed as 'software upgrade 5.2', the update brings along a handful of changes, including improved compatibility with non-standard chargers. Other changes include GPS crash-related fixes as well as stability and security-related optimizations. The Android Security Patch Level has also been bumped to April 1. As is usually the case with OTA roll outs, it may take some...