How to deal with someone who always "picks" at your every word?

I have a friend (she's a mom too) who often will try to contradict or correct what I say. For example, she'll tell me that her toddler fell hard on the ground and to make her feel better, I'll say "Yes, kids that age often are falling down and hurting themselves". Then she'll say "I'm not saying my daughter is a klutz because she rarely falls". Or something like "It's so nice out today". Then she'll say "Yeah, it's not bad except for the clouds on the horizon". Or whatever, the list goes on. This annoys me. It's as though I can never say anything right. Any suggestions?