The code in NumericUpDown.NumericUpDownBehavior.js adds "padding-right: 24px" to the <DIV> element which wraps a <TABLE> where the target text box is moved. The padding messes up layout if you want to have something (e.g. "OK" button) to the right of the NumericUpDown control (see attached image).
Comments: Solution: On the text box use style="padding-right:17px;"
Comments: Solution: On the text box use style="padding-right:17px;"