NodeJS is weird with async callbacks.

lib/blockManager.js

@@ -286,7 +286,7 @@ function calculatePPLNSPayments(blockHeader) {
         }
         cursor.close();
         txn.abort();
-        callback(null, totalPaid);
+        setImmediate(callback, null, totalPaid);
     }, function (totalPayment) {
         blockCheckHeight = blockCheckHeight - 1;
         debug("Decrementing the block chain check height to:" + blockCheckHeight);