Evidently, basic grammar know-how is not necessary in order to develop applications for Facebook. Maybe my students are correct when they say they don't "need this stuff." **sigh** The word "your" shows, or is supposed to show, possession or ownership. The word "you're" means "you are." If a writer can substitute "you are" whenever there arises a your/you're question, then "you're" is correct. In this case, the writer should have chosen "you're."
I took the Real Age Quiz, and supposedly my real age is 23. Does that mean that I am immature? Don't answer that.