I do believe they resolved it. The problem I see most is the rocker stands are to be torqued @ 45lbs on the heads yet jesel shows them to be 65 and this is too much. I run them and they are a great head and yes some have had problems.
I just brought a engine that has them. it has crower shaft rockers was told that if you run a shaft set up that has 1 piece stands that it will keep the head from braking.are the jesal set up one piece