For weeks now, we've been having nothing but brown eggs. That's because our two Ameraucanas, Ophelia and Alana (producers of blue and green eggs, respectively) have been vigorously molting. This annual cycle of feather-shedding and -regrowing is supposed to last somewhere around 6 weeks, and is perfectly normal.
Today, at last, Ophelia laid her first post-molt egg. An exceptionally smooth, small egg, too. It's as if her body has snapped back to an adolescent-hen state.
From what I've read, chickens lay better-tasting and better-formed eggs after they molt. We'll see.
In the meantime, it's just nice have her blue egg in the carton.