diff --git a/code/ryzom/client/src/character_cl.cpp b/code/ryzom/client/src/character_cl.cpp
index e74539f74..8edc071c9 100644
--- a/code/ryzom/client/src/character_cl.cpp
+++ b/code/ryzom/client/src/character_cl.cpp
@@ -366,6 +366,9 @@ CCharacterCL::CCharacterCL()
 		_PvpEnemies[i] = false;
 	}
 
+	_ClanCivMaxFame  = PVP_CLAN::None;
+	_ClanCultMaxFame = PVP_CLAN::None;
+
 	_OutpostId = 0;
 	_OutpostSide = OUTPOSTENUMS::UnknownPVPSide;
 
diff --git a/code/ryzom/client/src/entities.cpp b/code/ryzom/client/src/entities.cpp
index b1af0a092..fcf5d3f08 100644
--- a/code/ryzom/client/src/entities.cpp
+++ b/code/ryzom/client/src/entities.cpp
@@ -1575,6 +1575,7 @@ void CEntityManager::updateVisualProperty(const NLMISC::TGameCycle &gameCycle, c
 		string propName = toString("SERVER:Entities:E%d:P%d", slot, prop);
 		TProperty propty;
 		propty.GC    = gameCycle;
+		propty.Value = 0;
 //		propty.Value = IngameDbMngr.getProp(propName);
 
 
@@ -1849,7 +1850,7 @@ CEntityCL *CEntityManager::getEntityByName (const ucstring &name, bool caseSensi
 
 	uint i;
 	const uint count = (uint)_Entities.size();
-	uint selectedEntityId;
+	uint selectedEntityId = 0;
 	float selectedEntityDist = FLT_MAX; // No selected Entity
 
 	for (i=0; i<count; i++)
diff --git a/code/ryzom/client/src/entity_cl.cpp b/code/ryzom/client/src/entity_cl.cpp
index d3aa6cb69..bacb99464 100644
--- a/code/ryzom/client/src/entity_cl.cpp
+++ b/code/ryzom/client/src/entity_cl.cpp
@@ -734,7 +734,7 @@ void CEntityCL::init()
 	}
 	_NameId = 0;
 
-	_PermanentStatutIcon = string("");
+	_PermanentStatutIcon.clear();
 
 	// Not a mission target by default
 	_MissionTarget = false;
diff --git a/code/ryzom/client/src/init.cpp b/code/ryzom/client/src/init.cpp
index 75e12fba5..ff581b12b 100644
--- a/code/ryzom/client/src/init.cpp
+++ b/code/ryzom/client/src/init.cpp
@@ -724,9 +724,6 @@ void prelogInit()
 		setReportEmailFunction ((void*)sendEmail);
 		setDefaultEmailParams ("smtp.nevrax.com", "", "ryzombug@nevrax.com");
 
-		// create the data dir.
-		if (!CFile::isExists("data")) CFile::createDirectory("data");
-
 		// create the save dir.
 		if (!CFile::isExists("save")) CFile::createDirectory("save");
 
diff --git a/code/ryzom/client/src/interface_v3/interface_manager.cpp b/code/ryzom/client/src/interface_v3/interface_manager.cpp
index c332539dd..89f6a82f5 100644
--- a/code/ryzom/client/src/interface_v3/interface_manager.cpp
+++ b/code/ryzom/client/src/interface_v3/interface_manager.cpp
@@ -2755,7 +2755,6 @@ bool CInterfaceManager::handleEvent (const CEventDescriptor& event)
 	}
 	else if (event.getType() == CEventDescriptor::mouse && _MouseHandlingEnabled )
 	{
-
 		CEventDescriptorMouse &eventDesc = (CEventDescriptorMouse&)event;
 
 		// First thing to do : Capture handling
@@ -6504,7 +6503,7 @@ bool CInterfaceManager::parseTokens(ucstring& ucstr)
 			}
 			else if (token_param == ucstring("race"))
 			{
-				CCharacterCL *pC = (CCharacterCL*)(pTokenSubjectEntity);
+				CCharacterCL *pC = dynamic_cast<CCharacterCL*>(pTokenSubjectEntity);
 				if (pC)
 				{
 					EGSPD::CPeople::TPeople race = pC->people();
@@ -6542,7 +6541,7 @@ bool CInterfaceManager::parseTokens(ucstring& ucstr)
 				GSGENDER::EGender gender = GSGENDER::neutral;
 				if (pTokenSubjectEntity->isUser() || pTokenSubjectEntity->isPlayer() || pTokenSubjectEntity->isNPC())
 				{
-					CCharacterCL *pC = (CCharacterCL*)(pTokenSubjectEntity);
+					CCharacterCL *pC = dynamic_cast<CCharacterCL*>(pTokenSubjectEntity);
 					if (pC)
 					{
 						gender = pC->getGender();
diff --git a/code/ryzom/client/src/landscape_poly_drawer.cpp b/code/ryzom/client/src/landscape_poly_drawer.cpp
index 5ec749eca..f4dd53a70 100644
--- a/code/ryzom/client/src/landscape_poly_drawer.cpp
+++ b/code/ryzom/client/src/landscape_poly_drawer.cpp
@@ -609,12 +609,11 @@ void CLandscapePolyDrawer::computeBBoxFromPolygon(const NLMISC::CPolygon2D &poly
 	}
 
 	// search for min and max dimensions of polygon on x and y axes.
-	CVector2f rectMax, rectMin;
-	for(uint i=0; i<poly2D.Vertices.size(); i++)
+	CVector2f point = poly2D.Vertices[0];
+	CVector2f rectMax(point), rectMin(point);
+	for(uint i=1; i<poly2D.Vertices.size(); i++)
 	{
-		const CVector2f & point = poly2D.Vertices[i];
-		if(i==0)
-			rectMin = rectMax = point;
+		point = poly2D.Vertices[i];
 
 		rectMax.x = std::max(rectMax.x, point.x);
 		rectMax.y = std::max(rectMax.y, point.y);
diff --git a/code/ryzom/client/src/login_patch.cpp b/code/ryzom/client/src/login_patch.cpp
index 912249d6b..cd27fd00b 100644
--- a/code/ryzom/client/src/login_patch.cpp
+++ b/code/ryzom/client/src/login_patch.cpp
@@ -2568,8 +2568,8 @@ void CPatchThread::run()
 		for (i = 0; i < AllFilesToPatch.size(); ++i)
 		{
 			CPatchManager::SFileToPatch &rFTP = AllFilesToPatch[i];
-			string ext = rFTP.FileName.substr(rFTP.FileName.rfind('.'), rFTP.FileName.size());
-			if (ext == ".ref")
+			string ext = NLMISC::CFile::getExtension(rFTP.FileName);
+			if (ext == "ref")
 			{
 				float oldCurrentFilePatched = CurrentFilePatched;
 				processFile (rFTP);
@@ -2589,8 +2589,9 @@ void CPatchThread::run()
 		for (i = 0; i < AllFilesToPatch.size(); ++i)
 		{
 			CPatchManager::SFileToPatch &rFTP = AllFilesToPatch[i];
-			string ext = rFTP.FileName.substr(rFTP.FileName.rfind('.'), rFTP.FileName.size());
-			if (ext == ".bnp")
+			
+			string ext = NLMISC::CFile::getExtension(rFTP.FileName);
+			if (ext == "bnp")
 			{
 				float oldCurrentFilePatched = CurrentFilePatched;
 				processFile (rFTP);
diff --git a/code/ryzom/client/src/user_entity.cpp b/code/ryzom/client/src/user_entity.cpp
index 05f856230..a5c016f34 100644
--- a/code/ryzom/client/src/user_entity.cpp
+++ b/code/ryzom/client/src/user_entity.cpp
@@ -3904,7 +3904,7 @@ bool	CUserEntity::canCastShadowMap() const
 void	CUserEntity::forceLookEntity(const NLMISC::CVectorD &dir2targIn, bool updateHeadPitch, bool /* start */)
 {
 	CVectorD	dir2targ= dir2targIn;
-	float		frontYawBefore;
+	float		frontYawBefore = 0.f;
 	float		frontYawAfter;
 
 	// Third person: bkup current yaw
diff --git a/code/ryzom/common/src/game_share/server_edition_module.cpp b/code/ryzom/common/src/game_share/server_edition_module.cpp
index e2cb7755a..0062b80f9 100644
--- a/code/ryzom/common/src/game_share/server_edition_module.cpp
+++ b/code/ryzom/common/src/game_share/server_edition_module.cpp
@@ -524,7 +524,7 @@ std::string CKeysHolder::getSignature(const std::string& md5, const std::string&
 bool CKeysHolder::verifyKey(const std::string& md5, const std::string& signature)
 {
 
-	std::string key = "";
+	std::string key;
 
 	if ( !signature.empty() )
 	{
@@ -2787,7 +2787,7 @@ void CServerEditionModule::createSession(NLNET::IModuleProxy *sender, TCharId ow
 			TScenarioHeaderSerializer::TValueType::const_iterator first(values.begin()), last(values.end());
 			bool nevraxScenario = false;
 			bool trialAllowed = false;
-			std::string missionTag = "";
+			std::string missionTag;
 
 
 			for ( ; first != last; ++first)
@@ -3834,7 +3834,7 @@ void CServerEditionModule::startScenario(NLNET::IModuleProxy *senderModuleProxy,
 			getAnimationModule()->scheduleStartSession(body);
 			bool trialAllowed = false;
 			bool nevraxScenario = false;
-			std::string missionTag = "";
+			std::string missionTag;
 
 			/*Informs EGS that the animation has started*/
 			if ( getLinkedSessionId(body.SessionId) == TSessionId(0) && session->getSessionType() == RSMGR::TSessionType::st_anim )
diff --git a/code/ryzom/server/src/ai_service/script_vm.h b/code/ryzom/server/src/ai_service/script_vm.h
index 6fc8a01f1..a1ffcd64a 100644
--- a/code/ryzom/server/src/ai_service/script_vm.h
+++ b/code/ryzom/server/src/ai_service/script_vm.h
@@ -20,6 +20,8 @@
 #include "nel/misc/smart_ptr.h"
 //#include "ai_grp.h"
 
+#include <limits>
+
 namespace AIVM
 {
 
@@ -71,7 +73,7 @@ public:
 class CByteCodeEntry {
 public:
 	CByteCodeEntry()
-	: _Index(~0)
+	: _Index(std::numeric_limits<size_t>::max())
 	{
 	}
 	CByteCodeEntry(NLMISC::CSmartPtr<CByteCode const> code, size_t index)
@@ -81,7 +83,7 @@ public:
 	}
 	bool isValid()const
 	{
-		return _Index!=~0;
+		return _Index != std::numeric_limits<size_t>::max();
 	}
 	NLMISC::CSmartPtr<CByteCode const>& code() { return _Code; }
 	size_t& index() { return _Index; }
diff --git a/code/ryzom/server/src/ai_service/stdpch.h b/code/ryzom/server/src/ai_service/stdpch.h
index ae82daa14..c2f2190e4 100644
--- a/code/ryzom/server/src/ai_service/stdpch.h
+++ b/code/ryzom/server/src/ai_service/stdpch.h
@@ -50,6 +50,7 @@
 #include <exception>
 #include <utility>
 #include <deque>
+#include <limits>
 
 
 //----------------------------------------------------------------
diff --git a/code/ryzom/server/src/entities_game_service/player_manager/cdb_synchronised.cpp b/code/ryzom/server/src/entities_game_service/player_manager/cdb_synchronised.cpp
index cd6693a72..7c7be7fa4 100644
--- a/code/ryzom/server/src/entities_game_service/player_manager/cdb_synchronised.cpp
+++ b/code/ryzom/server/src/entities_game_service/player_manager/cdb_synchronised.cpp
@@ -146,7 +146,8 @@ void CCDBSynchronised::read( const string& fileName )
 		// value
 		token = strtok(buffer," \t");
 		if( token == NULL ) continue;
-		sint64 value = atoi(token);
+		sint64 value;
+		NLMISC::fromString(token, value);
 		
 		// property name
 		token = strtok(NULL," \n");
diff --git a/code/ryzom/tools/leveldesign/world_editor/land_export/main.cpp b/code/ryzom/tools/leveldesign/world_editor/land_export/main.cpp
index d3e107d17..83c93f311 100644
--- a/code/ryzom/tools/leveldesign/world_editor/land_export/main.cpp
+++ b/code/ryzom/tools/leveldesign/world_editor/land_export/main.cpp
@@ -106,7 +106,7 @@ struct SOptions : public SExportOptions
 
 	string getStr (const string &var)
 	{
-		string ret = "";
+		string ret;
 		try
 		{
 			CConfigFile::CVar &cvString = cf.getVar (var);
diff --git a/code/ryzom/tools/stats_scan/user_char_filters.cpp b/code/ryzom/tools/stats_scan/user_char_filters.cpp
index ee8e458a2..98b269900 100644
--- a/code/ryzom/tools/stats_scan/user_char_filters.cpp
+++ b/code/ryzom/tools/stats_scan/user_char_filters.cpp
@@ -41,7 +41,7 @@ FILTER(Money,"<min> [<max>]")
 	CSString s0= s.firstWord(true);
 	CSString s1= s.firstWord(true);
 	uint32 min= s0.atoi();
-	uint32 max= (s1.empty()? ~0u: s1.atoi());
+	uint32 max= (s1.empty()? std::numeric_limits<uint32>::max(): s1.atoi());
 	if ( (min==0 && s0!="0") ||  (max==0 && s1!="0") || !s.strip().empty() )
 	{
 		nlwarning("Bad arguments in filter: should be <min> [<max>]");