diff --git a/src/cc/CCutils.cpp b/src/cc/CCutils.cpp
index 491798a98..d4de992f7 100644
--- a/src/cc/CCutils.cpp
+++ b/src/cc/CCutils.cpp
@@ -193,7 +193,7 @@ bool Getscriptaddress(char *destaddr,const CScript &scriptPubKey)
         strcpy(destaddr,(char *)CBitcoinAddress(address).ToString().c_str());
         return(true);
     }
-    fprintf(stderr,"ExtractDestination failed\n");
+    //fprintf(stderr,"ExtractDestination failed\n");
     return(false);
 }
 
diff --git a/src/cc/dice.cpp b/src/cc/dice.cpp
index ee41dca17..e456ea6ae 100644
--- a/src/cc/dice.cpp
+++ b/src/cc/dice.cpp
@@ -284,7 +284,7 @@ uint64_t DiceCalc(int64_t bet,int64_t odds,int64_t minbet,int64_t maxbet,int64_t
                 break;
             }
         }
-        fprintf(stderr,"modval %d vs %d\n",modval,(int32_t)(10000/(odds+1)));
+        //fprintf(stderr,"modval %d vs %d\n",modval,(int32_t)(10000/(odds+1)));
         if ( modval < 10000/(odds+1) )
             winnings = bet * (odds+1);
     }
diff --git a/src/main.cpp b/src/main.cpp
index ae8f92887..938cfdfe0 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -4259,7 +4259,7 @@ bool CheckBlock(int32_t *futureblockp,int32_t height,CBlockIndex *pindex,const C
             const CTransaction &tx = e.GetTx();
             const uint256 &hash = tx.GetHash();
             tmpmempool.addUnchecked(hash,e,!IsInitialBlockDownload());
-            fprintf(stderr, "added mempool tx to temp mempool\n");
+            //fprintf(stderr, "added mempool tx to temp mempool\n");
         }
         // clear the mempool before importing all block txs to mempool.
         mempool.clear();
@@ -4322,7 +4322,7 @@ bool CheckBlock(int32_t *futureblockp,int32_t height,CBlockIndex *pindex,const C
                 invalidtxs++;
             //else fprintf(stderr, "added mempool tx back to mempool\n");
         }
-        if ( invalidtxs > 0 )
+        if ( 0 && invalidtxs > 0 )
             fprintf(stderr, "number of invalid txs: %d\n",invalidtxs );
         // empty the temp mempool for next time.
         tmpmempool.clear();
diff --git a/src/script/standard.cpp b/src/script/standard.cpp
index fde836154..c7999a7de 100644
--- a/src/script/standard.cpp
+++ b/src/script/standard.cpp
@@ -246,7 +246,7 @@ bool ExtractDestination(const CScript& scriptPubKey, CTxDestination& addressRet)
         CPubKey pubKey(vSolutions[0]);
         if (!pubKey.IsValid())
         {
-            fprintf(stderr,"TX_PUBKEY invalid pubkey\n");
+            //fprintf(stderr,"TX_PUBKEY invalid pubkey\n");
             return false;
         }