When using a TilePane in FX 2.1, a stack trace is printed during layout.

At layout or relayout, the following trace is repeatedly printed in the program's error output when a TilePane is included in the scene.

java.lang.Thread.getStackTrace(Thread.java:1567)
javafx.scene.layout.TilePane.layoutChildren(Unknown Source)
javafx.scene.Parent.layout(Unknown Source)
javafx.scene.Scene.layoutDirtyRoots(Unknown Source)
javafx.scene.Scene.doLayoutPass(Unknown Source)