Confirmed. Ade's right about the issue causing this. I'm leaning towards reverting the whole SUID-situation to how things were with busybox-power 1.19.3power1 (that is: no SUID bit and no workaround patch at all). Being able to run ping, su, etc. as a non-privileged user seems to be not worth the effort and the risk of breaking applications like preenv (there may be other applications getting broken that we're not aware of).