diff --git a/ryzom/server/src/ai_service/sheets.cpp b/ryzom/server/src/ai_service/sheets.cpp
index 5aae572a1..a1fe61d7a 100644
--- a/ryzom/server/src/ai_service/sheets.cpp
+++ b/ryzom/server/src/ai_service/sheets.cpp
@@ -971,7 +971,7 @@ uint32 AISHEETS::CSheets::getGroupPropertiesIndex(const std::string &groupIndexN
 	if (groupIndexName.empty())
 		return	std::numeric_limits<uint32>::max();
 	
-	std::map<string, uint32>::iterator it = _NameToGroupIndex.find(NLMISC::toUpper(groupIndexName));
+	std::map<string, uint32>::iterator it = _NameToGroupIndex.find(NLMISC::toUpperAscii(groupIndexName));
 	if (it==_NameToGroupIndex.end())
 	{
 		uint32 groupIndex = (uint32)_NameToGroupIndex.size();
diff --git a/ryzom/server/src/entities_game_service/egs_sheets/egs_static_game_sheet.cpp b/ryzom/server/src/entities_game_service/egs_sheets/egs_static_game_sheet.cpp
index 4927db680..9bf6fdfe9 100644
--- a/ryzom/server/src/entities_game_service/egs_sheets/egs_static_game_sheet.cpp
+++ b/ryzom/server/src/entities_game_service/egs_sheets/egs_static_game_sheet.cpp
@@ -1134,14 +1134,14 @@ bool CStaticCreatures::applyUserModel(CCustomElementId userModelId, const std::v
 		splitString(scriptData[i], " ", scriptLine);
 		
 		if (scriptLine.size() < 2
-			|| toLower(scriptLine[0]) == "protect" && scriptLine.size() < 3)
+			|| toLowerAscii(scriptLine[0]) == "protect" && scriptLine.size() < 3)
 		{
 			nlwarning("<CStaticCreatures::applyUserModel> error while reading a script line (uncommented line %i), ignoring it.", i);
 			errors = true;
 			continue;
 		}
 
-		switch (attributeMap.find(toLower(scriptLine[0])))
+		switch (attributeMap.find(toLowerAscii(scriptLine[0])))
 		{
 
 			//FIXME: test attributes value before applying, if error set to default value and errors=true
diff --git a/ryzom/server/src/server_share/continent_container.cpp b/ryzom/server/src/server_share/continent_container.cpp
index 9babc998b..140fa9bd9 100644
--- a/ryzom/server/src/server_share/continent_container.cpp
+++ b/ryzom/server/src/server_share/continent_container.cpp
@@ -102,8 +102,8 @@ void	CContinentContainer::loadContinent(string name, string file, sint index, bo
 
 	for (its=_SheetMap.begin(); its!=_SheetMap.end(); ++its)
 	{
-		if (NLMISC::toLower((*its).second.Name) == NLMISC::toLower(name+".continent") ||
-			NLMISC::toLower((*its).second.PacsRBank) == NLMISC::toLower(name+".rbank"))
+		if (NLMISC::toLowerAscii((*its).second.Name) == NLMISC::toLowerAscii(name+".continent") ||
+			NLMISC::toLowerAscii((*its).second.PacsRBank) == NLMISC::toLowerAscii(name+".rbank"))
 		{
 			if (found == _SheetMap.end())
 			{
@@ -281,14 +281,14 @@ void	CContinentContainer::initPacsPrim(const string &path)
 	for(k=0; k<fileNames.size(); ++k)
 	{
 		// check extension
-		if (NLMISC::toLower(CFile::getExtension(fileNames[k])) != "pacs_prim")
+		if (NLMISC::toLowerAscii(CFile::getExtension(fileNames[k])) != "pacs_prim")
 		{
 			// not a pacs primitive, skip it..			
 			continue;
 		}
 		try
 		{		
-			string	ppName = NLMISC::toLower(CFile::getFilenameWithoutExtension(fileNames[k]));
+			string	ppName = NLMISC::toLowerAscii(CFile::getFilenameWithoutExtension(fileNames[k]));
 
 			if (_PacsPrimMap.find(ppName) != _PacsPrimMap.end())
 				continue;
@@ -365,8 +365,8 @@ void	CContinentContainer::loadPacsPrims(const CSheet &sheet, NLPACS::UMoveContai
 			{
 				TPacsPrimMap::iterator pbIt;
 
-				string	shapeName = NLMISC::toLower(CFile::getFilenameWithoutExtension(igLoader.getShapeName(k)));
-				string	instanceName = NLMISC::toLower(CFile::getFilenameWithoutExtension(igLoader.getInstanceName(k)));
+				string	shapeName = NLMISC::toLowerAscii(CFile::getFilenameWithoutExtension(igLoader.getShapeName(k)));
+				string	instanceName = NLMISC::toLowerAscii(CFile::getFilenameWithoutExtension(igLoader.getInstanceName(k)));
 
 				bool	isTrigger = false;
 				bool	isZC = false;
diff --git a/ryzom/tools/client/r2_islands_textures/screenshot_islands.cpp b/ryzom/tools/client/r2_islands_textures/screenshot_islands.cpp
index 03cc6bd81..2b4730ee4 100644
--- a/ryzom/tools/client/r2_islands_textures/screenshot_islands.cpp
+++ b/ryzom/tools/client/r2_islands_textures/screenshot_islands.cpp
@@ -1244,7 +1244,7 @@ void CScreenshotIslands::loadIslands()
 						for (map<string, CVector2f>::iterator it(zonePosMap.begin()), end(zonePosMap.end()); it != end; ++it)
 							if (it->second.x >= zonelXMin && it->second.x <= zonelXMax
 								&& it->second.y >= zonelYMin && it->second.y <= zonelYMax)
-								island.Zones.push_back(NLMISC::toUpper(it->first));
+								island.Zones.push_back(NLMISC::toUpperAscii(it->first));
 					}
 					break;
 				}