diff --git a/alethzero/MainWin.cpp b/alethzero/MainWin.cpp
index dbf517405..baec6f938 100644
--- a/alethzero/MainWin.cpp
+++ b/alethzero/MainWin.cpp
@@ -367,7 +367,8 @@ void Main::readSettings()
 		for (unsigned i = 0; i < b.size() / sizeof(Secret); ++i)
 		{
 			memcpy(&k, b.data() + i * sizeof(Secret), sizeof(Secret));
-			m_myKeys.append(KeyPair(k));
+			if (!count(m_myKeys.begin(), m_myKeys.end(), KeyPair(k)))
+				m_myKeys.append(KeyPair(k));
 		}
 	}
 	m_client->setAddress(m_myKeys.back().address());
diff --git a/libethereum/State.cpp b/libethereum/State.cpp
index 392780bd9..76f5be020 100644
--- a/libethereum/State.cpp
+++ b/libethereum/State.cpp
@@ -867,7 +867,7 @@ u256 State::execute(bytesConstRef _rlp)
 	commit();
 
 	if (e.t().receiveAddress)
-		assert(m_db.lookup(storageRoot(e.t().receiveAddress), true).size());
+		assert(!storageRoot(e.t().receiveAddress) || m_db.lookup(storageRoot(e.t().receiveAddress), true).size());
 
 	cnote << "Executed; now" << rootHash();
 	cnote << old.diff(*this);