Changing yield not reflected in print view

Problem: If you change the yield using the Yield box in a recipe, that's not reflected if you go to print out the Printer-friendly version.

Steps to reproduce:

1) Pick any recipe, change the yield to something other than what it is. Click on "change". Notice the recipe ingredient quantities change, and all that good stuff.

2) Click on the Printer-friendly version link.

3) Notice the yield is now back to the original one saved in the database.