Jackson just failed to connect with a driven Harper cross 10 minutes from time as Darlington tried to pinch the three points from Harriers.
The home side retaliated and Durnin connected with a Skovbjerg cross only to shoot weakly and too close to Keen.
Durnin came so close to grabbing a winner a minute from time when volleyed Skovbjerg cross into the ground but Keen tipped his efforts over the bar.
The striker then had a shot blocked for a corner and he took the flag kick himself but it came to nothing.
Darlington's substitute Convery, who replaced Campbell on 70 minutes, produced a positive run down the right but his shot from the edge of the box was wide of Clarke's goal.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules hereComments are closed on this article