The spells are kind of messed up for some reason. On all my custom races they work fine but the Pandaren have very small or no visuals for spells that are either on them (buffs etc) or coming directly from the model (like Shadowflame).
The Worgen female also seems to be having this problem.
http://imgur.com/l2MyTqA Screenshot may be a bit vague, but I don't think I need one anyway to explain this.
Any ideas on this?