Good morning/afternoon/evening,
The Divs for the Column Header text are declared as follows.
<div style="text-align: left; margin: 4px 2px 4px 4px; overflow: hidden; text-overflow: ellipsis;"><span style="text-overflow: ellipsis; cursor: default;">Quantity</span></div>
However, when the column is resized to be thinner and obscure the trailing text, the ellipsis (…) is not showing.
This happens on my Desktop Browser (Mozilla SeaMonkey) & Mobile Safari (iOS 6.1.3).
You can confirm this by looking at your own Resizing Demo (columnsresizing.htm).
The problem is related to using autoshowcolumnsmenubutton:false.
Thanks, Michael.