Luckily I was doing a deploy when I found this so I just made a quick change and redeployed.
If you look at the API tool, it looks like they changed the property name from "friends" to "Friends". No clue why, no clue why no warning.. but I just changed my code to check to see if a property "friends" exists, and if it does not to use "Friends" if that is available..
But having the code change randomly like this, very very bad form on myspace's part.