I always found the front pockets of jean patterns to be the most difficult. My first attempts at making jeans for dolls generally had non-functioning jeans pockets. :p However this is all going to change because I just found a really great little Jeans style front pocket tutorial! Now although the tut is for human sized pants, everything shown can be easily used to make doll jeans. So without further ado here is the link to the tutorial, and I shall be off to create a new pair of jeans for my girl!
http://sewinspired.blogspot.com/2007/07/jeans-style-front-pockets-tutorial.html