Catskin Leather item lacks Acrobatics bonus, complete description
The Catskin Leather armor only awards the +5 Stealth Competence bonus from its Shadow enchantment. It should also award a +5 Acrobatics Competence Bonus. Per the item description in Ultimate Equipment:
"[T]his extremely supple suit of jetblack +1 shadow leather armor grants a portion of the grace and fortune of a feline. It has no armor check penalty or maximum Dexterity bonus. The wearer receives a +5 competence bonus on Acrobatics checks and takes only half normal damage from falling. When the wearer’s hit points would be reduced to a negative amount equal to her Constitution score from an attack or spell, the armor falls to pieces and is destroyed, and the wearer takes only half damage from the attack or spell."