New thread, in answer to this post:
I have update today a jme folder, and I have a error in Demo.java in line 68 which look like this:
There is info that the method getLogger() is undefined for LoggingSystem :/
The logging system changed a bit. To set the global logging level, you'll have to do it the "standard way", by creating a logging configuration file, and setting it up in your java startup call:
java -Djava.util.logging.config.file=myOwnLogging.properties -jar MyCoolJMEApp.jar
For further info, you can try http://java.sun.com/j2se/1.4.2/docs/guide/util/logging/, but for setting global logging properties you might be better off with http://www.forward.com.au/javaProgramming/javaGuiTips/javaLogging.html, section "User controlled Logging", or anything else you can find on the net.