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I sintalled the 3.4.1 final after using 3.4.1 Dev release 2 for a while. When first booted my projects were kind of messed up, and many java releated options showed up in the options window as being "unknown option". When I checked the modules setting in the options window all the Java options were turned off. I installed from scratch twice and had the same behaviour. For a first time user of netbeans this would be a complete killer, since the IDE appears to be completely broken, and won't even open a java source file properly, and they would have absolutely no idea how to fix it.
I assume that Tomas is responsible for this issue, so reassigning. R.
Java modules are definitely not turned off. It works for me without problems. Can you start NetBeans with new NetBeans user directory? Please, check ide.log file for exceptions and other unusual messages. Thanks. BTW: There is no OSX installer.
Closing as invalid until more information is available.