I'' start with asking you a question. Can you see what the deflection number is on the limbs? You can view it on the underside of the limb butt near the limb bolt? If it's 3 numbers such as 135 then these are Barnesdale limbs, commonly used with the Rytera bows. If so, then rest your mind and just shoot the bow. If the limb deflection reads something like 3HP then these are Martin limbs. If so then you have the updated limbs that replaced those which were causing problems in the two prior years.
You can do your own searching, but if you get a yen to have an extra pair of limbs around then I would contact Dave Barnesdale. He makes about the best limbs that you can get and prices start at about $150/set. Personally I wouldn't worry about it until or unless you experience any limb problems.
If You're Not Living on the Edge You're Taking Up Too Much Space
Martin/Rytera Staff Shooter
PSAA Life member, UBP Life member
PADI AOW Diver