Hi,
There seems to be an issue with the number input when used with width 100% and placed inside a fieldset tag.
Everything loads ok, but when you quickly resize the window to a smaller size, (or orientation change from landscape to portrait in case of mobile) The number input seems to overflow and not adjust itself to the width of the window.
This only happens with number input.
Please check this fiddle http://jsfiddle.net/mohamedazher/Kgp4M/. When you try and resize the browser slowly, the widget seems to resize, but when you resize it fast, the widget would fail to do so. The same happens when you restore your browser to a smaller size.
Also as mentioned this only happens if the widget is wrapped inside a fieldset tag. It works fine when you remove the fieldset tag.
-Mohamed Azher