I have a wheel mouse and to open a link in a new tab I have always clicked the wheel.
Just recently, the clicking the wheel has no effect on links on the DIY site for some reason. I have to resort to right clicking, then left click the"open
link in new tab".
The wheel still works as usual, however, on all other sites that I visit.
(The wheel does work, however, on the ad links on DIY, just not on the DIY links)