There is an issue in the date picker. When we select a date from the date picker and then go to the cell to edit it manually, the date gets parsed leniently and gets shown in the textbox beside the calendar. The default parsing criteria of date picker is strict parsing. But it's not giving us the required result.
For example if I select the date as "2012-08-23". Then edit it manually to "2012-08-2" it becomes "2012-08-02". This happens in GXT 3. In GXT 2 the date did not use to be parsed leniently and get stored in the text box. It used to remain as "2012-08-2".