Is this a OSX Mavericks?

Yes.

If so can you double check you are running the latest JVM?

Skywalker:bin alesj$ java -version

java version "1.7.0_45"

Java(TM) SE Runtime Environment (build 1.7.0_45-b18)

Java HotSpot(TM) 64-Bit Server VM (build 24.45-b08, mixed mode)

Latest?