The following tests both fail when run under Linux and JDK 1.7.0_76-b13.
JaninoEventEvaluatorTest.nullMDC:271 null MDCBasedDiscriminatorTest.nullMDC:75 expected:<{}> but was:<{key <&>'"]]>=value <&>'"]]>}>
I was unable to reproduce the problem under Windows and JDK 1.6 nor 1.7.0_17-b02.