As a newbie in ExtJS (version 3.2) and Japanese IME, I'm puzzled that I see odd behaviors using Ext.form.NumberField.

Basically, out of the box Ext.form.NumberField doesn't think numbers in Hiragana mode of IME as valid numeric values, and as soon as I enter numbers they all get cleared out. The odd thing is that numbers on the number pad seem to be treated as numbers fine.

Can someone please explain me what's going on here and how I could resolve the issue?

Thanks for your help!