These two questions blend into each other. I think it is likely that the next update will help resolve this issue. So after then ext update, remove the .67 kernel and then boot into the next Later kernel that the update brings.
If it works, great. If not, you can just fall back to the .56
Unless the later kernels have something you need; then having the Latest kernel is not only not necessary... But can even be Worse. Earlier stable kernels tend to perform better.