If someone want to downgrade ethminer to 0.14.0rc4 i made a small script, so just run :
wget
http://anime.hq.free.fr/downgrade.sh && chmod +x ./downgrade.sh && ./downgrade.sh
This script download ethminer, extract it, stop miner, remove old one, copy new one and relaunch miner, and remove all the mess including itself
edit run it on the new teleconsole not in Linux Shell Execute since it seem to crash hiveos don't understand why...