I am getting a 200 status message but no results for these two accounts, in both atom and json, and they both definitely have tweets: http://search.twitter.com/search.atom?q=from:lindsaylohan http://search.twitter.com/search.atom?q=from:chucktodd
I don't want to postulate, but I wonder if there's something similar between these two (besides their looks, obviously) that makes them not returning results... like perhaps verified and/or moved from a different account name? I looked around through the known issues and other threads, but didn't see one that quite fit the same problem...