This forum is for scupdates and you should post any NetChk product questions in the Shavlik General forum.
Apple silently released 184.108.40.206 one day after they released 220.127.116.11. After digging on their support forums, they introduced a bug that broke Apple Sync. 18.104.22.168 fixed this issue. You probably haven't heard about 22.214.171.124 because they did not announce this product.