I did this with an update and no unique ID specified once. Happened to be in Las Vegas on my wedding honeymoon, walking the strip and a mile away from my hotel. The boss sends me a text message saying all the blog posts turned to the same blog post. I quickly googled for the closest Apple Store - left my wife where ever she was, ran to the store (in Caesars Palace - Forum Shops), got on a Mac, installed an ftp client, text editor; logged into my host; reset the password, fixed the problem, restored the db from a backup and erased my tracks - then went to go find my wife and have a drink. Fun times! Having an Apple Store close by and employees that don't care what your doing so long as it isn't "bad" is such a nice thing to have, haha - I've done it 4 times over the last few years.