Run PickTest3D demo, you can clearly see the pixels on the textures. Move the mouse over any shape, all the textures become blurred (or antialiased?) and never return back to the original state. It is triggered by the following code in mouse move handler (currently line 471):

                            ((PhongMaterial)shape.getMaterial()).setSelfIlluminationMap(
                                    createHoverImage(tex.getX(), tex.getY()));

Setting the selfIlluminationMap to null when the mouse leaves doesn't change it back.