Sometimes java 1.5.0_65-b10 throws NullPointerException from java.awt.EventQueue.isDispatchThread.
This reproduces only sometimes (once in 150 runs on my machine), but since the test is so quick it doesn't take long to reproduce.

# while $JAVA_HOME/bin/java Test; do; done
Exception in thread "main" java.lang.NullPointerException
at java.awt.EventQueue.isDispatchThread(EventQueue.java:726)
at Test.main(Test.java:5)

# $JAVA_HOME/bin/java -version
java version "1.5.0_65"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_65-b10)
Java HotSpot(TM) 64-Bit Server VM (build 1.5.0_65-b10, mixed mode)

Running on Linux 3.13.6-1-ARCH x86_64 with X.Org X Server 1.15.0.

---- CODE ----
import java.awt.EventQueue;

public class Test {
  public static void main(String[] args) throws Exception {
    boolean disp = EventQueue.isDispatchThread();
  }
}
---- END CODE ----

Sleeping for 10 seconds before calling isDispatchThread did not help.
(I tried this since I thought it might be some kind of VM startup race)