pokerstars took away my railbird icon pic.......

I know I have been not able to play a lo tlately in poker,but today I go to play and I see my railbird pic icon I have been using since I came here,is gone! I contact pokerstars and they sent me a email stating it's a new rule of some sort.Anyone know why this is a ruling? As I have said,I have not been a regular in awhile.Just starting to get back into things. I like my pink railbird!..... Not sure what I will use now,got to pick something else out.I don't mean to start all out war against pokerstars as I do enjoy playing there~I just want to know what happened to cause this new ruling..... best of luck to you all on the felt today!