http://www.ukclimbing.com/forums/t.php?t=579135
Last month danbow73 posted the above about holes in his
tea shirts . At the time I hadn't experienced the problem and couldn't understand it.
But last night at the wall my harness had a firm hold of my shirt and it would be easy to see how it would rip. The upper and lower bits that the belay loop go though are very stiff and when brought together very firmly grip the shirt and can be dragged into one of those holes.
It doesn't put me off the harness but it's certainly some thing to look out for.