It seems like there is an issue with using sliced sprites on a UISlider foreground.
When the slider is at value 0 the auto scaled foreground is not set to width 0 but rather -sliced Border amount.
The result is the border part sticking out to the left of the sliders 0 point (see screen shot).
Is this fixed in later releases or does someone have a good work around?
Unity 4.3.1f1 + NGUI 3.0.7f3
Thanks!