In my wanderings through Pinterest, I came across this infographic the other day. I think it is really good for both parents and teachers, so they know what to expect. And yes, it is OK if you're child is still mispronouncing words in kindergarten. It may also be a great reference to have at conferences so your parents know what is developmentally appropriate or not. (I was going to say "normal", but we all know normal is a relative term, right?)
I can't get the picture to get any bigger, but if you click on it, it'll take you right to the page with a bigger picture.