diff --git a/src/network/bmobject.py b/src/network/bmobject.py
index 318cbfd1..98a14b5e 100644
--- a/src/network/bmobject.py
+++ b/src/network/bmobject.py
@@ -32,7 +32,7 @@ class BMObject(object):
     # min TTL, 3 hour (in the past
     minTTL = -3600
 
-    def __init__(self, nonce, expiresTime, objectType, version, streamNumber, data):
+    def __init__(self, nonce, expiresTime, objectType, version, streamNumber, data, payloadOffset):
         self.nonce = nonce
         self.expiresTime = expiresTime
         self.objectType = objectType
@@ -40,7 +40,7 @@ class BMObject(object):
         self.streamNumber = streamNumber
         self.inventoryHash = calculateInventoryHash(data)
         self.data = data
-        self.tag = ''
+        self.tag = data[payloadOffset:payloadOffset+32]
 
     def checkProofOfWorkSufficient(self):
         # Let us check to make sure that the proof of work is sufficient.
@@ -69,6 +69,17 @@ class BMObject(object):
         if self.inventoryHash in Inventory():
             raise BMObjectAlreadyHaveError()
 
+    def checkObjectByType(self):
+        if self.objectType == protocol.OBJECT_GETPUBKEY:
+            self.checkGetpubkey()
+        elif self.objectType == protocol.OBJECT_PUBKEY:
+            self.checkPubkey()
+        elif self.objectType == protocol.OBJECT_MSG:
+            self.checkMessage()
+        elif self.objectType == protocol.OBJECT_BROADCAST:
+            self.checkBroadcast()
+        # other objects don't require other types of tests
+
     def checkMessage(self):
         return
 
@@ -77,15 +88,12 @@ class BMObject(object):
             logger.info('getpubkey message doesn\'t contain enough data. Ignoring.')
             raise BMObjectInvalidError()
 
-    def checkPubkey(self, tag):
+    def checkPubkey(self):
         if len(self.data) < 146 or len(self.data) > 440:  # sanity check
             logger.info('pubkey object too short or too long. Ignoring.')
             raise BMObjectInvalidError()
-        if self.version >= 4:
-            self.tag = tag
-            logger.debug('tag in received pubkey is: %s' % hexlify(tag))
 
-    def checkBroadcast(self, tag):
+    def checkBroadcast(self):
         if len(self.data) < 180:
             logger.debug('The payload length of this broadcast packet is unreasonably low. Someone is probably trying funny business. Ignoring message.')
             raise BMObjectInvalidError()
@@ -93,7 +101,3 @@ class BMObject(object):
         # this isn't supported anymore
         if self.version < 2:
             raise BMObjectInvalidError()
-
-        if self.version >= 3:
-            self.tag = tag
-            logger.debug('tag in received broadcast is: %s' % hexlify(tag))
diff --git a/src/network/bmproto.py b/src/network/bmproto.py
index 32bf038c..9b1ba08e 100644
--- a/src/network/bmproto.py
+++ b/src/network/bmproto.py
@@ -263,7 +263,7 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
     def bm_command_object(self):
         objectOffset = self.payloadOffset
         nonce, expiresTime, objectType, version, streamNumber = self.decode_payload_content("QQIvv")
-        self.object = BMObject(nonce, expiresTime, objectType, version, streamNumber, self.payload)
+        self.object = BMObject(nonce, expiresTime, objectType, version, streamNumber, self.payload, self.payloadOffset)
 
         if len(self.payload) - self.payloadOffset > BMProto.maxObjectPayloadSize:
             logger.info('The payload length of this object is too large (%s bytes). Ignoring it.' % len(self.payload) - self.payloadOffset)
@@ -291,15 +291,8 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
                     isinstance(e, BMObjectExpiredError):
                 raise e
 
-        if self.object.objectType == protocol.OBJECT_GETPUBKEY:
-            self.object.checkGetpubkey()
-        elif self.object.objectType == protocol.OBJECT_PUBKEY:
-            self.object.checkPubkey(self.payload[self.payloadOffset:self.payloadOffset+32])
-        elif self.object.objectType == protocol.OBJECT_MSG:
-            self.object.checkMessage()
-        elif self.object.objectType == protocol.OBJECT_BROADCAST:
-            self.object.checkBroadcast(self.payload[self.payloadOffset:self.payloadOffset+32])
-        # other objects don't require other types of tests
+        self.object.checkObjectByType()
+
         Inventory()[self.object.inventoryHash] = (
                 self.object.objectType, self.object.streamNumber, self.payload[objectOffset:], self.object.expiresTime, self.object.tag)
         objectProcessorQueue.put((self.object.objectType,self.object.data))