we are using GXT 2.2.1 with GWT 2.1.0. Pasting data into NumberFields using Strg+v does not work in FireFox (v3.6.13). As far as I can see the event is cancelled in TriggerField.onKeyPress() because 'v' is not in the list of allowed characters. So something with handling special keys seems to go wrong. Works fine in Chrome and IE8.