"Before Aftermath if I went below the radar, nothing would be able to lock onto me, but now it doesn't seem to do anything, no matter how close I get to the ground I can still get locked on, has it been changed?"
Let's help this guy out, maybe even try to contact him to see if he has found his answer yet. This poor soul's question was silenced by the update.
[url=http://halo.bungie.net/Forums/posts.aspx?postID=76762512]Here's a link to the original thread.[/url]