There is a woman at school who obviously disapproves of my DD. I don't understand why exactly, or what to do. She has told her daughter not to play with mine. This is awkward because the girls like each other and are part of a happy, accepting, small class of girls.
My DD is a fun-loving, creative, kind and loyal friend. She is a bit zany, enthusiastic and disorganised but polite and well-liked. The other woman's daughter is very well behaved, sweet, and very bright, but seems confused as she tries to do as her mother says when she is nearby.
The other woman is very competitive and germ-phobic. She has told her daughter that she must excel at school, so she can become a doctor, so I wonder if she is blaming my DD for a disappointing report card?
The woman has scolded my DD several times for normal childish play, both in front of me and when I have not been there. I don't think this is appropriate unless DD was doing something bad or dangerous (which she has not). She makes some bizarre comments, eg "Don't take credit for my daughters work after I take her home today" (to another child in the class).
In conversation the mother makes thinly veiled rude comments to me. Perhaps she thinks I don't notice? I don't want to create friction or a scene, as there are a good number of years together ahead at school, and I am much less part of the mothers clique/quiche 
AIBU to ask her what is her problem? Or the other mothers who are more approachable?