diff --git a/README.md b/README.md
index 8b5ff903d..cfa223a56 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,9 @@
 ## Ethereum C++ Client.
 
+[![Build
+Status](http://build.ethdev.com/buildstatusimage?builder=Linux%20C%2B%2B%20master%20branch)](http://build.ethdev.com/builders/Linux%20C%2B%2B%20master%20branch/builds/-1) master [![Build
+Status](http://build.ethdev.com/buildstatusimage?builder=Linux%20C%2B%2B%20develop%20branch)](http://build.ethdev.com/builders/Linux%20C%2B%2B%20develop%20branch/builds/-1) develop
+
 By Gav Wood, 2014.
 
 [![Build
diff --git a/libethcore/CommonEth.cpp b/libethcore/CommonEth.cpp
index ff5e6aed0..5e510572e 100644
--- a/libethcore/CommonEth.cpp
+++ b/libethcore/CommonEth.cpp
@@ -32,7 +32,7 @@ namespace dev
 namespace eth
 {
 
-const unsigned c_protocolVersion = 50;
+const unsigned c_protocolVersion = 49;
 const unsigned c_databaseVersion = 5;
 
 static const vector<pair<u256, string>> g_units =
diff --git a/libethereum/State.cpp b/libethereum/State.cpp
index fd00761e1..e02b06bcd 100644
--- a/libethereum/State.cpp
+++ b/libethereum/State.cpp
@@ -1017,7 +1017,7 @@ u256 State::execute(bytesConstRef _rlp, bytes* o_output, bool _commit)
 	ctrace << "Executing" << e.t() << "on" << h;
 	ctrace << toHex(e.t().rlp());
 #endif
-#if ETH_TRACE
+#if ETH_VMTRACE
 	e.go(e.simpleTrace());
 #else
 	e.go();
diff --git a/test/stRefundTestFiller.json b/test/stRefundTestFiller.json
index 4060bbb72..6b2b2fc15 100644
--- a/test/stRefundTestFiller.json
+++ b/test/stRefundTestFiller.json
@@ -141,5 +141,168 @@
              "secretKey" : "45a915e4d060149eb4365960e6a7a45f334393093061116b197e3240065ff2d8",
              "data" : ""
          }
+     },
+
+    "refund50_1" : {
+         "env" : {
+             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+             "currentNumber" : "0",
+             "currentGasLimit" : "1000000",
+             "currentDifficulty" : "256",
+             "currentTimestamp" : 1,
+             "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+         },
+         "pre" : {
+             "095e7baea6a6c7c4c2dfeb977efac326af552d87" : {
+                 "balance" : "1000000000000000000",
+                 "nonce" : 0,
+                 "code" : "{ [[ 1 ]] 0 [[ 2 ]] 0 [[ 3 ]] 0 [[ 4 ]] 0 [[ 5 ]] 0 }",
+                 "storage" : {
+                     "0x01" : "0x01",
+                     "0x02" : "0x01",
+                     "0x03" : "0x01",
+                     "0x04" : "0x01",
+                     "0x05" : "0x01"
+                 }
+             },
+             "a94f5374fce5edbc8e2a8697c15331677e6ebf0b" : {
+                 "balance" : "10000",
+                 "nonce" : 0,
+                 "code" : "",
+                 "storage": {}
+             }
+         },
+         "transaction" : {
+             "nonce" : "0",
+             "gasPrice" : "1",
+             "gasLimit" : "10000",
+             "to" : "095e7baea6a6c7c4c2dfeb977efac326af552d87",
+             "value" : "0",
+             "secretKey" : "45a915e4d060149eb4365960e6a7a45f334393093061116b197e3240065ff2d8",
+             "data" : ""
+         }
+     },
+
+    "refund50_2" : {
+         "env" : {
+             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+             "currentNumber" : "0",
+             "currentGasLimit" : "1000000",
+             "currentDifficulty" : "256",
+             "currentTimestamp" : 1,
+             "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+         },
+         "pre" : {
+             "095e7baea6a6c7c4c2dfeb977efac326af552d87" : {
+                 "balance" : "1000000000000000000",
+                 "nonce" : 0,
+                 "code" : "{ [[ 10 ]] 1 [[ 11 ]] 1 [[ 1 ]] 0 [[ 2 ]] 0 [[ 3 ]] 0 [[ 4 ]] 0 [[ 5 ]] 0 }",
+                 "storage" : {
+                     "0x01" : "0x01",
+                     "0x02" : "0x01",
+                     "0x03" : "0x01",
+                     "0x04" : "0x01",
+                     "0x05" : "0x01"
+                 }
+             },
+             "a94f5374fce5edbc8e2a8697c15331677e6ebf0b" : {
+                 "balance" : "10000",
+                 "nonce" : 0,
+                 "code" : "",
+                 "storage": {}
+             }
+         },
+         "transaction" : {
+             "nonce" : "0",
+             "gasPrice" : "1",
+             "gasLimit" : "10000",
+             "to" : "095e7baea6a6c7c4c2dfeb977efac326af552d87",
+             "value" : "0",
+             "secretKey" : "45a915e4d060149eb4365960e6a7a45f334393093061116b197e3240065ff2d8",
+             "data" : ""
+         }
+     },
+
+    "refund500" : {
+         "env" : {
+             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+             "currentNumber" : "0",
+             "currentGasLimit" : "1000000",
+             "currentDifficulty" : "256",
+             "currentTimestamp" : 1,
+             "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+         },
+         "pre" : {
+             "095e7baea6a6c7c4c2dfeb977efac326af552d87" : {
+                 "balance" : "1000000000000000000",
+                 "nonce" : 0,
+                 "code" : "{ @@1 @@2 [[ 10 ]] (EXP 2 0xff) [[ 11 ]] (BALANCE (ADDRESS)) [[ 1 ]] 0 [[ 2 ]] 0 [[ 3 ]] 0 [[ 4 ]] 0 [[ 5 ]] 0 [[ 6 ]] 0 }",
+                 "storage" : {
+                     "0x01" : "0x01",
+                     "0x02" : "0x01",
+                     "0x03" : "0x01",
+                     "0x04" : "0x01",
+                     "0x05" : "0x01",
+                     "0x06" : "0x01"
+                 }
+             },
+             "a94f5374fce5edbc8e2a8697c15331677e6ebf0b" : {
+                 "balance" : "10000",
+                 "nonce" : 0,
+                 "code" : "",
+                 "storage": {}
+             }
+         },
+         "transaction" : {
+             "nonce" : "0",
+             "gasPrice" : "1",
+             "gasLimit" : "10000",
+             "to" : "095e7baea6a6c7c4c2dfeb977efac326af552d87",
+             "value" : "0",
+             "secretKey" : "45a915e4d060149eb4365960e6a7a45f334393093061116b197e3240065ff2d8",
+             "data" : ""
+         }
+     },
+
+    "refund600" : {
+         "env" : {
+             "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6",
+             "currentNumber" : "0",
+             "currentGasLimit" : "1000000",
+             "currentDifficulty" : "256",
+             "currentTimestamp" : 1,
+             "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba"
+         },
+         "pre" : {
+             "095e7baea6a6c7c4c2dfeb977efac326af552d87" : {
+                 "balance" : "1000000000000000000",
+                 "nonce" : 0,
+                 "code" : "{ @@1 @@2 [[ 10 ]] (EXP 2 0xffff) [[ 11 ]] (BALANCE (ADDRESS)) [[ 1 ]] 0 [[ 2 ]] 0 [[ 3 ]] 0 [[ 4 ]] 0 [[ 5 ]] 0 [[ 6 ]] 0 }",
+                 "storage" : {
+                     "0x01" : "0x01",
+                     "0x02" : "0x01",
+                     "0x03" : "0x01",
+                     "0x04" : "0x01",
+                     "0x05" : "0x01",
+                     "0x06" : "0x01"
+                 }
+             },
+             "a94f5374fce5edbc8e2a8697c15331677e6ebf0b" : {
+                 "balance" : "10000",
+                 "nonce" : 0,
+                 "code" : "",
+                 "storage": {}
+             }
+         },
+         "transaction" : {
+             "nonce" : "0",
+             "gasPrice" : "1",
+             "gasLimit" : "10000",
+             "to" : "095e7baea6a6c7c4c2dfeb977efac326af552d87",
+             "value" : "0",
+             "secretKey" : "45a915e4d060149eb4365960e6a7a45f334393093061116b197e3240065ff2d8",
+             "data" : ""
+         }
      }
+
 }