Basically this update is a full ota style leak... meaning that the kernel is updated through this file as well... There were some major issues with the Droid X android 2.2 release that seemed to have been resolved (atleast for me) with this leak... After 2 days of heavy testing im pretty convinced the media bug s fixed (use my phone as primary mp3 player and used to get the "sorry this music player doesnt support..." several times daily... have yet to get one with heavy use... Also the SMS timestamp bug is fixed, and the battery manager force close seems to be fixed (been checking it constantly in different scenarios and still no force close... All in all im way more happy with my X after this update and I,m pretty convinced that this is the OTA that everyone is waiting patiently for (not a virtue I posess). TBH knows there stuff and when they say they have something, 99.9% of the time it seems like they do... They are legit and Im convinced this update is as well... just be careful and make sure u wipe data after install! ive noticed the install instructions vary among different sites... u want to wipe, format system, MOUNT SYSTEM! then install from sd card... wipe data once more for good measure after the install is complete (cant hurt)... Ive heard horror stories of bootloops from this update and its all people that negelected to understand how drastic this update is (new bootkeys), and who failed to really follow driections... As long as you stick to the directions word for word you will be good!!! Starting from a clean 2.3.15 cant hurt im sure!