6u23 is auto downloaded if 1.6* is specified in jnlp file, but 6u23 does not meat the security baseline. If newer that 6u23 version requested(like 1.6.0_27):
JNLPException
        at com.sun.javaws.Launcher.downloadJREResource(Unknown Source)
        at com.sun.javaws.Launcher.prepareResources(Unknown Source)
        at com.sun.javaws.Launcher.prepareAllResources(Unknown Source)
        at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
        at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
        at com.sun.javaws.Launcher.launch(Unknown Source)
        at com.sun.javaws.Main.launchApp(Unknown Source)
        at com.sun.javaws.Main.continueInSecureThread(Unknown Source)
        at com.sun.javaws.Main$1.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
I am working with Andy to determine the exact lines to add to the file:

First proposal is:
7u1\ b08=1.7.0_01
6u29\ b110=1.6.0_29
The AllReleases file can be found in the webserver config directory here:
/saferoot/sw/JSC.build/webapps-config/jawsautodl/j2se

It was modified with two new entries:
7u1\ b08=1.7.0_01
6u29\ b11=1.6.0_29

The four webservers we restarted several minutes apart to load the configuration file.

Andy has been notified to test the fix.