The JNLP file format has not changed between the 1.0 and this release.
If your JNLP file is compatible with a version of Java Web Start that is lower than 1.0, please note that the JNLP file format has changed significantly. Below is a list of the most common modifications that needs to be applied to a 0.4 JNLP file to make it compatible with Java Web Start 1.0 or higher:
Converting JNLP files used with the 1.0-beta or 1.0-rc release only requires updating the spec attribute to "1.0".