See attached capture.
As you notice the rendering of the DELETE itself in the menu is strange: the icon doesn't look correct (it's way better on Mac).
Rendering is not that important, but what imports is that when running Scene Builder on some systems such as Windows XP Pro Simplified Chinese you can't open the Edit menu at all (see DTL-4047).
I suspect the root cause comes from the accelerator attached to Delete action within the Edit menu because if I comment the corresponding line and restart Scene Builder on the same system then I come able to open the Edit menu.
The call I comment is "setAccelerator(new KeyCodeCombination(KeyCode.DELETE));"