Thanks everybody for the advice. I too was bullied in school but I'm shocked at the age of the kids - we're talking 5 and 6 years old.
I've made an appointment to meet both the teacher and principal on Monday after school. Surprisingly, or maybe not, when speaking with the secretary to arrange the meeting, she was able to "guess" which child is involved.
I'm not wearing rose-tinted glasses, I know there is every possibility my child could be a factor here - but in the parent/teacher meetings before I have been told what a sensitive, polite and thoughtful child she is. The teacher told me that my daughter wouldn't say or do anything to anybody else that would upset them. She is very sensitive, and will be upset if she knocks over her toddler brother.
Something I have found very annoying, and maybe it's the cultural difference from what I grew up with compared to where I live, is that nearly anybody I have spoken to has told me that I should tell my child to hit the other one back! When I tell them I don't want my child to retaliate with violence, they have all said it's the only way to sort it. Whatever happened to "two wrongs don't make a right" and "violence is not the answer"?
The is no excuse for any person of any age putting their hands on somebody else, and I'm somewhat concerned I'm fighting a losing battle here if that is the mentality that I'm going to have to deal with. Today the other child made mine a "im sorry" card, and my daughter told me she has forgiven her.... I'm thinking this card was likely the apparent punishment the other child was given.
Stop for a minute, open your mind, learn. You may not agree with what I say, I may not agree with what you say but we will both learn something new.