PMP v4 vs. v5

 I have been studying for the exam (retesting) using v4.    I just submitted my application last week, waiting to get approval to sit for the exam AGAIN.  If I don't get the okay before July26 I will have to sit using v5.  I know there is another knowledge area but does anyone know if there is drastic differences between the two study materials?  Thanks everyone!

 

P>S>  I just read about the changes, so I guess everything else stays the same.  Sorry for the post.