*Hey, there's an error in the 0.70 version of CheckColumn in the constructor: it adds a listerner grid.getView().mainBody directly, which doesn't exist until the GridView is rendered. Corrected code below:




Ext.grid.CheckColumn.prototype = {
** *init: function(grid) {
** * * *this.grid = grid;
** * *
** * * *// FIX---> mainBody isn't set until render, so we can't call right now.
** * * *grid.on("render", function () {
** * * * * *this.grid.getView().mainBody.on("mousedown", this.onMouseDown, this);
** * * *}, this);
** * * *// END FIX
** * * *
** * * * * // var view = this.grid.getView();

** * * * * // view.mainBody.on("mousedown", this.onMouseDown, this);
** *},

** *
** *...
** *