i turned my son around when he was able to ride forward facing.
seriously, my son screamed everytime he got in the car rear-facing... even if someone was in the back seat with him. once he cried the entire car ride... we stopped and he was red, in tears, and just really upset. i guess he was really scared.
i held off forward facing for as long as i could, but geesh my son was really horrible with it. he is FF now at 13 months and a happier kid in the car.
however, i have been talking to hubby about trying out rear-facing again, because i know it is safest and our son is still within the weight limit for it.