On Wed, Aug 19, 2015 at 11:31 AM, Jorge Timón wrote: > I don't think just using version=4 for cltv and friends would be a > problem if it wasn't for the XT/nonXT issue. What problem am I missing if we just mask of the offending bits. For my own project which uses auxpow (and thus has weird nVersion), I also used the bitmasking method to get rid of auxpow version bits before making the standard integer comparisons to deploy BIP66 using IsSuperMajority(): if ((block.nVersion & 0xff) >= 4 && CBlockIndex::IsSuperMajority(...)) { //...}