Steps to repro:

a) install Eclipse 3.5
b) install JBoss Profiler feature from update site http://download.jboss.org/jbosstools/updates/nightly/3.1.0.M2/
c) restart Eclipse
d) create a Java project, eg., foobar
e) create a Main class in that project, eg., foo.bar.Main
f) put this in Main.java:

package foo.bar;
public class Main {
/**

• @param args
  */
  public static void main(String[] args) { System.out.println("Hello, Foo!"); }

  }

f) debug the class: right-click in the file and Debug As > Java Application
g) add a breakpoint on the println() line
h) debug again, this time switching to the Debug perspective when prompted
i) right-click in class file, Debug As > Debug Configurations...
j) note the new JBoss Profiler tab for your Java Application > Main launch configuration – see screenshot-1. Close the dialog.
k) right-click in class file, Profile As > Profile Configurations...
l) note three error dialogs:

"Exception occurred creating launch config tabs - Reason: No tab group defined for launch config type org.eclipse.jdt.launching.localJavaApplication"
"Problem occurred: no tabs defined for launch configuration type Java Application"
"NullPointerException" (see screenshot-2).