My dd is a teen at secondary school. A few weeks ago one of her classes put on a show and it was to encourage the pupils to be as professional as possible, everything was to be perfect etc. On the programme dd's name was spelled incorrectly. Her name has 3 letters and is a standard spelling.
Parents were given feedback forms. I gave really good positive feedback but did mention that dd's name was wrong in the programme.
Next day in class the teacher said to all the pupils that it was nice that everyone's parents gave positive feedback except dd's.
3 times since this the teacher has spelled Dd's name wrong and when dd has mentioned it the teacher has said "oh I wouldn't want your mum to pull me up again" 
Teacher seems to be obviously displeased with my feedback. Dd has said it's getting really annoying and she feels it's being done on purpose now.
So parent's night this week, would it be petty to mention it again or let it go and just let dd constantly correct her and get snide comments?