fa cup semi-finalists reading still have lingering relegation worries in the championship .
reading took the lead with only four minutes gone when pavel pogrebnyak got a touch to garath mccleary 's nod-down to divert the ball past cardiff goalkeeper david marshall .
but they allowed a mediocre cardiff side to snatch a point in the 90th minute when conor mcaleny rifled in a shot from aron gunnarsson .