Grid + CheckboxSelectionModel

[Zdeno]

You have CheckboxSelection model which have defines:

width : 42,
header : '<div class="x-grid3-hd-checker" style="width: 20px; margin-left: 20px;"> </div>', 

However, there is still old checkbox as background-image, because <td class="x-grid3-hd x-grid3-cell x-grid3-td-checker x-grid3-cell-first"> has inside <div class="x-grid3-hd-inner x-grid3-hd-checker">. Last div has inside header template from config.

[mitchellsimoens]

Hm... I hadn't noticed that till now myself. Are you wanting to report a bug? All Ext JS 3 fixes will be available to support subscribers only. You could simply use CSS to override a class style.

[Zdeno]

It is up to you. Im going override clients application into Ext 4. Maybe someone else need fix this probem.