is the rapid aging of the children based characters.
Two of my favourite shows does this Tudors and Bones.
For example the child Elizabeth of King Henry was a blond girl (throughout multiple ages) and suddenly now that she is of age he magically turned into a orangish brunette.
Come on people consistency isn't that hard.
played by Kate Duggan
Although the actress who portrays Elizabeth after her hair colour change has a striking resembles to the true Elizabeth Tudor.
Another example, at the end of one of the seasons of Bones, Bones had a daughter in an in the next season the daughter was already 4 or 5 and there was not long distance in the story lines.
It ruins things for me and I don't have a lot of time to waste on tv, so I just find it obnoxious.