duali, the full sentence is:  "North American free-trade agreement developments hardly made a dint in the media,"

The OED gives the following as one definition for the noun 'dint': 

" 3. A mark or impression made by a blow or by pressure, in a hard or plastic surface; an indentation; = dent n.1 4   (Also fig.)"

I think Martin used it in that figurative sense, as in - 'developments with NAFTA barely made an impression in the media.'

So, I think it was used correctly ... but if you still want to notify the Globe, the link is found after you click on Community Guidelines at top of the page.