This release contains bug fixes to OP_NUM2BIN, OP_CHECKMULTISIG, and OP_CHECKMULTISIGVERIFY.
Thus far there are no transactions on the network that cause these opcodes to perform incorrectly but the potential is out there and we recommend users upgrade to this version.
The good news is bchd is now passing the full script test vectors from Bitcoin-ABC and so we can be reasonably confident the scripting system is now fully compatible.