Run whatever fx snippet using the j2d pipeline on the mac.
Personally I use: -Dprism.debugfonts=true -Dprism.verbose=true -Dprism.order=j2d

I get a NPE everytime I resize the window, after that the windows no longer draws.

Here is my output:

Prism pipeline init order: j2d
Using t2k for text rasterization
Using dirty region optimizations
Prism pipeline name = com.sun.prism.j2d.J2DPipeline
*** Fallback to Prism SW pipeline
(X) Got class = class com.sun.prism.j2d.J2DPipeline
Initialized prism pipeline: com.sun.prism.j2d.J2DPipeline
RESIZE: 1339559033699184000 w: 300 h: 300
Glass native format: 1
2012-06-12 20:43:53.787 java[25149:707] [JRSAppKitAWT markAppIsDaemon]: Process manager already initialized: can't fully enable headless mode.
RESIZE: 1339559043441099000 w: 291 h: 288
Glass native format: 1
RESIZE: 1339559043488702000 w: 283 h: 278
Glass native format: 1
RESIZE: 1339559043496663000 w: 280 h: 275
Glass native format: 1
RESIZE: 1339559043538820000 w: 277 h: 271
Glass native format: 1
Glass detected outstanding Java exception at -[GlassRunnable run]:src/com/sun/mat/ui/GlassApplication.m:78
Exception in thread "AWT-AppKit" java.lang.NullPointerException
at com.sun.glass.ui.mac.MacView._uploadPixels(MacView.java:70)
at com.sun.glass.ui.View.uploadPixels(View.java:758)
at com.sun.prism.j2d.J2DPresentable$Glass$1.run(J2DPresentable.java:99)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:76)
RESIZE: 1339559043546210000 w: 276 h: 270
Glass native format: 1
RESIZE: 1339559043573615000 w: 275 h: 270
Glass native format: 1