I was reading a thread about barbarians being able to get fatigue immunity at level 9 with 1 Oracle / 8 Barbarian since you add your actual class levels to half your character level to determine the oracle curse feature.
I've looked at the basic multiclass rules and the variant multiclass rules and I see nothing about this.
Where are the rules for multiclassing that say you can do this?
Sorry if this has been asked already, my searches haven't come up with a link to the rules, only people talking about it working that way.
It's a special oracle-curse-only rule, not a general multiclassing rule.
Oracle’s Curse (Ex): Each oracle is cursed, but this curse comes with a benefit as well as a hindrance. This choice is made at 1st level, and once made, it cannot be changed. The oracle’s curse cannot be removed or dispelled without the aid of a deity. An oracle’s curse is based on her oracle level plus one for every two levels or Hit Dice other than oracle. Each oracle must a single curse. All curses can be found here.
Ten feet of speed isn't too hard to get back. Once you layer all the movement speed buffs you'd likely have acquired as a fatigueless RAGEWHATEVERPOUNCE barbarian, lacking ten feet probably won't matter much.