diff --git a/src/game/MiscHandler.cpp b/src/game/MiscHandler.cpp
index 696563474..624169fe8 100644
--- a/src/game/MiscHandler.cpp
+++ b/src/game/MiscHandler.cpp
@@ -1519,7 +1519,10 @@ void WorldSession::HandleMoveSetCanFlyAckOpcode( WorldPacket & recv_data )
     sLog.outDebug("WORLD: CMSG_MOVE_SET_CAN_FLY_ACK");
     //recv_data.hexlike();
 
-    recv_data.read_skip<uint64>();                          // guid
+    uint64 guid;                                            // guid - unused
+    if(!recv_data.readPackGUID(guid))
+        return;
+
     recv_data.read_skip<uint32>();                          // unk
 
     MovementInfo movementInfo;
diff --git a/src/game/MovementHandler.cpp b/src/game/MovementHandler.cpp
index 3d10973c6..b1e578893 100644
--- a/src/game/MovementHandler.cpp
+++ b/src/game/MovementHandler.cpp
@@ -526,8 +526,10 @@ void WorldSession::HandleMoveKnockBackAck( WorldPacket & recv_data )
 {
     sLog.outDebug("CMSG_MOVE_KNOCK_BACK_ACK");
 
-    uint64 guid;
-    recv_data.readPackGUID(guid);
+    uint64 guid;                                            // guid - unused
+    if(!recv_data.readPackGUID(guid))
+        return;
+
     recv_data.read_skip<uint32>();                          // unk
 
     MovementInfo movementInfo;
@@ -538,8 +540,10 @@ void WorldSession::HandleMoveHoverAck( WorldPacket& recv_data )
 {
     sLog.outDebug("CMSG_MOVE_HOVER_ACK");
 
-    uint64 guid;
-    recv_data.readPackGUID(guid);
+    uint64 guid;                                            // guid - unused
+    if(!recv_data.readPackGUID(guid))
+        return;
+
     recv_data.read_skip<uint32>();                          // unk
 
     MovementInfo movementInfo;
@@ -552,8 +556,10 @@ void WorldSession::HandleMoveWaterWalkAck(WorldPacket& recv_data)
 {
     sLog.outDebug("CMSG_MOVE_WATER_WALK_ACK");
 
-    uint64 guid;
-    recv_data.readPackGUID(guid);
+    uint64 guid;                                            // guid - unused
+    if(!recv_data.readPackGUID(guid))
+        return;
+
     recv_data.read_skip<uint32>();                          // unk
 
     MovementInfo movementInfo;
diff --git a/src/game/SpellHandler.cpp b/src/game/SpellHandler.cpp
index 2372dfd4b..85d600e7b 100644
--- a/src/game/SpellHandler.cpp
+++ b/src/game/SpellHandler.cpp
@@ -345,8 +345,10 @@ void WorldSession::HandleCastSpellOpcode(WorldPacket& recvPacket)
         if(unk1)
         {
             recvPacket.read_skip<uint32>();                 // >> MSG_MOVE_STOP
-            uint64 guid;
-            recvPacket.readPackGUID(guid);
+            uint64 guid;                                    // guid - unused
+            if(!recvPacket.readPackGUID(guid))
+                return;
+
             MovementInfo movementInfo;
             ReadMovementInfo(recvPacket, &movementInfo);
         }
diff --git a/src/shared/revision_nr.h b/src/shared/revision_nr.h
index 94f860d26..00c978acb 100644
--- a/src/shared/revision_nr.h
+++ b/src/shared/revision_nr.h
@@ -1,4 +1,4 @@
 #ifndef __REVISION_NR_H__
 #define __REVISION_NR_H__
- #define REVISION_NR "8600"
+ #define REVISION_NR "8601"
 #endif // __REVISION_NR_H__