No matter what I do, I cannot get drop-in replacement icons to work.

I am using the following tutorial as a guide:
http://docs.oracle.com/javafx/2/deployment/self-contained-packaging.htm#BCGIBBCI

I have also tried:
https://blogs.oracle.com/talkingjavadeployment/entry/native_packaging_cookbook_using_drop

I have tried asking for help on the OTN Forums:
https://forums.oracle.com/forums/message.jspa?messageID=10622306#10622306

And I don't seem to be the only person having this issue:
https://forums.oracle.com/forums/thread.jspa?threadID=2463114&tstart=15

I have tried using NetBeans 7.2 as well as 7.3 beta 2, and both JDK 7u9 and 7u10 b15

I have attached my NetBeans project as a test case.