Attached should make it so that rhgb doesn't exit if /etc/mtab doesn't exist. We should just assume there isn't anything mounted in that case just as if it's an empty file. I can't see any real problems with doing this. The other alternative is to just touch /etc/mtab in the livecd-creator
Created attachment 151632 [details] fix
should be fixed in rhgb-0.17.5-1.fc7