JNLP Launched App started caching all URLs

Question

We have a Java client/server app that downloads via jnlp launch (local machine has latest Java 7). When we compiled it for Java 7 it suddenly started caching urls that are not jars. In the Java 6 compile it will cache jars, but does not cache the other URLs. This is important because the jnlp cache causes the app to immediately be out of date.

How can I cause Java to cache the jars but not cache other resources? Thanks, I think that I read a thread that discussed this, but I can't find that thread any longer.