1. Install JavaFX 2.2b8.
2. unzip javafx_sdk-2_2_0-beta-b08-windows-i586-08_may_2012.exe
3. java -jar Ensemble.jar to run Ensemble.
4. mouseover Timeline, animation will play but stutter.
5. mouseover Timeline Events, animation will play but stutter.
6. mouseover Interpolator, animation will stutter for a moment, then ArrayIndexOutOfBoundsException will be printed to system.out, then animation will stop working.

Also occurs for Ensemble application at http://download.oracle.com/otndocs/products/javafx/2.1/samples/Ensemble/index.html

C:\Documents and Settings\John_Smith\My Documents\Downloads\javafx_samples-2_2_0-beta-b08-windows-08_may_2012\javafx-samples-2.2.0-beta>java -jar Ensemble.jar
---- FetchDocListTask docsUrl = http://download.oracle.com/javafx/2/api/
java.lang.ArrayIndexOutOfBoundsException: 2
        at com.sun.scenario.animation.shared.TimelineClipCore.playTo(Unknown Source)
        at javafx.animation.Timeline.impl_playTo(Unknown Source)
        at com.sun.scenario.animation.shared.InfiniteClipEnvelope.timePulse(Unknown Source)
        at javafx.animation.Animation.impl_timePulse(Unknown Source)
        at com.sun.scenario.animation.shared.AnimationPulseReceiver.timePulse(Unknown Source)
        at com.sun.scenario.animation.AbstractMasterTimer.timePulseImpl(Unknown Source)
        at com.sun.scenario.animation.AbstractMasterTimer$MainLoop.run(Unknown Source)
        at com.sun.javafx.tk.quantum.QuantumToolkit.pulse(Unknown Source)
        at com.sun.javafx.tk.quantum.QuantumToolkit$8.run(Unknown Source)
        at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
        at com.sun.glass.ui.win.WinApplication.access$100(Unknown Source)
        at com.sun.glass.ui.win.WinApplication$2$1.run(Unknown Source)
        at java.lang.Thread.run(Thread.java:722)