Mac OS
Java 1.5

Steps to reproduce:

- Create a WeatherFX Application
- Run the application
- Open 'weatherfx.Weather.fx' file
- Enable preview
  The exception pops up:

uncaught FX exception: net.java.javafx.type.expr.ValidationError net.java.javafx.type.expr.ValidationError: file:/Users/tester1/NetBeansProjects/
WeatherFXApplication1/src/weatherfx/WeatherModel.fx:89: Can't find function toString in windSpeed.toString()
	
	at windSpeed.toString() ("file:/Users/tester1/NetBeansProjects/WeatherFXApplication1/src/weatherfx/WeatherModel.fx", Line 89)
	at __composite__ = this.composeNode() ("jar:file:/Users/tester1/.netbeans/6.0rc1/modules/ext/javafx/javafxrt.jar!/javafx/ui/canvas/
CompositeNode.fx", Line 29)
	at sg = this.createNode() ("jar:file:/Users/tester1/.netbeans/6.0rc1/modules/ext/javafx/javafxrt.jar!/javafx/ui/canvas/Node.fx", Line 624)
	at root.addChild(i.getNode()) ("jar:file:/Users/tester1/.netbeans/6.0rc1/modules/ext/javafx/javafxrt.jar!/javafx/ui/Canvas.fx", Line 212)