Since the last security update of Java (7u45), a message appears when launching JavaViewer.
This message says : This application will be blocked in a future Java security update because the JAR file manifest does not contain the Permission attribute.
On this image, there is the original french message and the equivalent english one :

This message appears on Windows 7 using Chrome with Java 7u45 (32bits) and using IE 10 with Java 7u45 (64bits).
Thanks,
Nicolas