A software update is supposed to deliver the latest and greatest features to your device. It's not supposed to cripple your device. And yet that's exactly what happened to a number of customers who received the most recent update to their Droid X phones.
Source: http://www.wired.com/gadgetlab/2011/07/droid-x-update-problems/
ACCENTURE ACER ADOBE SYSTEMS ADVANCED SEMICONDUCTOR ENGINEERING