From reddit (which is more accurate than twitter):
"saurik
This only works on evasi0n 1.0.1 because it relies on the feature I had evad3rs add so I could solve this problem "correctly". In that light, it probably does work (it is not "dangerous" as I described the previous ones), but there is still little point in installing it because clearly a new build of Substrate would come out soon using this new feature I got from evad3rs ;P. (Which didn't happen yet as I took Christmas Eve/Day mostly as a holiday.)
(This does, btw, also argue that what I should have had them do is just reactivate launchd.conf... or maybe done that in addition to the rc.d thing... I kind of thought about that a couple days later, wasn't certain if it would work, and didn't have the energy to go back and beg for a different feature. Whatever... the rc.d thing probably needed to be done someday anyway... but maybe I will try to talk to planetbeing today.)"
http://www.reddit.com/r/jailbreak/c...ubstrate_fix_with_no_issues/ceaqjg6?context=3
They are working on it together......