Have problems with Firefox11 and IE9 and probably other versions of those two browsers.

· overriding the URL in their page script: deployJava.getJavaURL = 'http://java.com/inc/BrowserRedirect1.jsp'.
  It worked for online installation (when the Java detection NPAPI or ActiveX plugin is deactivated or removed)
  but doesn’t work whenever the JDT script is able to use the JD plugin.
 
  It seems that the java.sun.com domain URL is still used by the plugin.
  Understand it might be necessity to do hard-code this, otherwise ill-intentioned
  scripts could override the download location and install malware.

· Tried to make the JDT script behave as if it couldn’t find the plugin by
  overriding the detection function such as in deployJava.isPluginInstalled = function() { return false; },
  However this doesn’t work properly because deployJava.js appends the return URL
  and somehow BrowserRedirect1.jsp displays an error page when do that

Following the guidelines here: http://docs.oracle.com/javase/6/docs/technotes/guides/jweb/deployment_advice.html

The following thread suggests we are not the only ones experiencing this issue:

https://forums.oracle.com/forums/thread.jspa?threadID=2369163&tstart=0