I was changing the clutch cable on my Capri today and tried to use the front driver side pinch weld to jack it up. Had it half way up in the air before it failed and popped my fender out about half an inch so that was pretty cool. It turns out that these spots are known to be week.
Yah pinch welds suck without these. I usually just jack up on the subframe which is almost always best depending on the car and location.