So far I've found two bugs: The first is that the Ruby Pistol can be reloaded when it is full, the bullets just disappear. Second, is that all guns that have clip reloads (e.g. German riflemen and pistol classes) can jump during their reload sequence and it will cancel the animation and automatically finish filling the gun. I would fix that as fast as possible...
A possible one i just found is that if you try changing the type of grenade held by French heavy grenadiers, it will change the pistol to the ruby pistol and lock it there. You cant change the pistol back unless you select a different class and go back to it.