Testing the oc_cuffs on a handy seal, I observe something close to 2,000 bytes (not kb, bytes) free at startup. Each pose change consumes something like 600 bytes until stack-heap collision (which she sees and reports to me).
One night, I changed her poses until only a few hundred bytes of free space remained, then stopped. The next day, free space was back to close to 1,800 bytes.
Could be a memory leak, could be lazy garbage collection, could be both.