Thank you. You are probably correct. This afghan was made with a finer baby yarn. Others I have made did not curl......perhaps it is a result of casting on a little too snug! I am going to start another one soon, and will cast on a bit looser.
By the way, I posted last week regarding making socks. Well, that information came in very handy! I have my first sock started.....and it looks good....so far. Hopefully it will turn out ok. If I run into problems, I will post my concern there. Thanks for all your great help!!