I just read the thread about the LO who was bitten - a similar thing happened to us - today was my DS's first day at nursery and he banged his head. They explained that he was sitting down and reaching for a toy when he suddenly fell forward and hit his head on a plastic toy. He's only 6.5 months so still a bit wobbly when sitting but so far he normally falls either backwards or sideways or he gradually slumps forward, I've never seen him suddenly fall forward.
Anyway they said someone was with him and immediately gave him a cold compact, and he seems fine now, not upset or overly sleepy or anything - just has a very slightly raised red mark on his head. But should I be worried? The nursery cam recommended by more than one friend, and they do seem very good.
Anyway I just wondered if its normal for babies to bang their heads while they're gradually learning to sit/crawl (i.e. am I worrying about nothing?!) or should I be more concerned and see a doctor about it and have words with the nursery?