By what your describing it's NOT a cracked limb rather a cosmetic sliver off the edge? You shouldn't have an issue getting new limbs and if it's just a cosmetic sliver (WH gives great advice, have a Pro Shop check it) it's not a shooting issue.

For years when I shot Hoyts, especially carbonite limbs, they'd peel slivers off constantly with no worse the wear for shooting. Have a dealer check it to be sure.