Created attachment 146768 [details]
Example for showing instability in code formatting. Invoking formatter many times in a row gives different results!

Comment formatting works incorrectly. 

Sometimes comments are UNCOMMENTED by formatter!!! (in my case it depends on number of spaces used before comment, but I believe there may be more such cases).

To be precise it happens to incorrectly indented comments which appear just before javadocs.

This may lead to some serious issues. If you try to reformat whole project (as I did) you should start to be worried.

For example just try to reformat following code using default NB settings (7.4 or 8.0, openSuse 13.1, Win 7, Java 1.7_51).
(get attached file to make sure you are using the same number of spaces as I did)
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/**
 * This is class example for showing instability in code formatting.
 * Invoking formatter many times in a row gives different results!!!!
 * Tested in NB 7.4, 8.0, Windows 7, OpenSuse 13.1
 * 
 * @author Marcin Szpak, Laboratory of Visual Analysis ICM, University of Warsaw
 */
public class NetbeansFormattingBug {

      //this comment is going to be UNCOMMENTED!
    /**
     * javadoc here
     */
    public static void main(String[] args) {
    }

     //this comment is going to be PARTLY UNCOMMENTED!
    /**
     */
    public void method1() {

    }

                         //this comment is going CRAZY
    /**
     */
    public void method2() {

    }

      //public void superMethod() {} //this one will be uncommented which may lead to some SERIOUS PROBLEMS!!
    /**
     */
    public void method3() {

    }
}