diff --git a/code/ryzom/client/data/gamedev/interfaces_v3/bg_downloader.lua b/code/ryzom/client/data/gamedev/interfaces_v3/bg_downloader.lua
index 686e21b6c..c2569b301 100644
--- a/code/ryzom/client/data/gamedev/interfaces_v3/bg_downloader.lua
+++ b/code/ryzom/client/data/gamedev/interfaces_v3/bg_downloader.lua
@@ -84,7 +84,7 @@ function bgdownloader:setPatchProgress(progress)
 
 	self:getPrioCB().active = true
 	local progressPercentText = string.format("%d%%", 100 * progress)
-	local progressPostfix = math.mod(os.time(), 3)	
+	local progressPostfix = math.fmod(os.time(), 3)	
 	local progressDate = nltime.getLocalTime() / 500
 	local colValue = math.floor(230 + 24 * math.sin(progressDate))
 	local color = string.format("%d %d 	%d %d", colValue, colValue, colValue, 255)
diff --git a/code/ryzom/client/data/gamedev/interfaces_v3/game_r2_loading.lua b/code/ryzom/client/data/gamedev/interfaces_v3/game_r2_loading.lua
index dd3af3c88..33a3810d3 100644
--- a/code/ryzom/client/data/gamedev/interfaces_v3/game_r2_loading.lua
+++ b/code/ryzom/client/data/gamedev/interfaces_v3/game_r2_loading.lua
@@ -521,7 +521,7 @@ function GameR2Loading:validateLoading()
 	
 	local filename = GameR2Loading.CurrentFile	
 	
-	if  string.find(filename, '\.r2', -3) == nil then
+	if  string.find(filename, '.r2', -3) == nil then
 		messageBox(i18n.get("uiR2EDLoadScenario_InvalidFileName"))
 		return
 	end
diff --git a/code/ryzom/client/data/gamedev/interfaces_v3/interaction.lua b/code/ryzom/client/data/gamedev/interfaces_v3/interaction.lua
index 07d081874..d36486e99 100644
--- a/code/ryzom/client/data/gamedev/interfaces_v3/interaction.lua
+++ b/code/ryzom/client/data/gamedev/interfaces_v3/interaction.lua
@@ -131,7 +131,7 @@ local function levelToForceRegion(level)
 end 
 
 local function levelToLevelForce(level)
-	return math.floor(math.mod(level, 50) * 5 / 50) + 1	
+	return math.floor(math.fmod(level, 50) * 5 / 50) + 1	
 end 
 
 
diff --git a/code/ryzom/client/data/gamedev/interfaces_v3/out_v2_appear.lua b/code/ryzom/client/data/gamedev/interfaces_v3/out_v2_appear.lua
index c082f9c00..3754b6b76 100644
--- a/code/ryzom/client/data/gamedev/interfaces_v3/out_v2_appear.lua
+++ b/code/ryzom/client/data/gamedev/interfaces_v3/out_v2_appear.lua
@@ -135,7 +135,7 @@ end
 --function outgame:setPatchProgress(progress)
 --	--debugInfo("*** 3 ***")
 --	local progressPercentText = string.format("%d%%", 100 * progress)
---	local progressPostfix = math.mod(os.time(), 3)	
+--	local progressPostfix = math.fmod(os.time(), 3)	
 --	--debugInfo("Patch in progress : " .. tostring(progress))		
 --	local progressDate = nltime.getLocalTime() / 500
 --	local colValue = math.floor(230 + 24 * math.sin(progressDate))
diff --git a/code/ryzom/client/data/gamedev/interfaces_v3/outpost.lua b/code/ryzom/client/data/gamedev/interfaces_v3/outpost.lua
index e015cdf7e..1036148a0 100644
--- a/code/ryzom/client/data/gamedev/interfaces_v3/outpost.lua
+++ b/code/ryzom/client/data/gamedev/interfaces_v3/outpost.lua
@@ -56,7 +56,7 @@ function game:outpostAdjustHour(uiLocal, prop)
 	local h = runExpr(prop);
 	
 	-- add time zone and clamp hour
-	h = math.mod(h + tz + 24, 24);
+	h = math.fmod(h + tz + 24, 24);
 	uiGroup[uiLocal].uc_hardtext = string.format('%02d:00', h);
 end
 
@@ -288,8 +288,8 @@ function game:outpostActiveDefenderHourButton()
 		local timeRangeDef= getDbProp(path .. ':TIME_RANGE_DEF');
 		local timeRangeDefWanted= getDbProp(path .. ':TIME_RANGE_DEF_WANTED');
 		timeRangeDef= secondsSince1970ToHour( timeRangeDef );
-		timeRangeDef= math.mod(timeRangeDef+24, 24);
-		timeRangeDefWanted= math.mod(timeRangeDefWanted+24, 24);
+		timeRangeDef= math.fmod(timeRangeDef+24, 24);
+		timeRangeDefWanted= math.fmod(timeRangeDefWanted+24, 24);
 
 		-- if time required is the one obtained, or if we are in peace
 		if( timeRangeDef == timeRangeDefWanted or status<=game.OutpostEnums.Peace ) then
@@ -323,8 +323,8 @@ function game:outpostActiveAttackerHourButton()
 		local timeRangeAtt= getDbProp('UI:TEMP:OUTPOST:DECLARE_WAR_ACK_TIME_RANGE_ATT');
 		local timeRangeAttWanted= getDbProp('UI:TEMP:OUTPOST:DECLARE_WAR_ATTACK_PERIOD');
 		timeRangeAtt= secondsSince1970ToHour( timeRangeAtt );
-		timeRangeAtt= math.mod(timeRangeAtt+24, 24);
-		timeRangeAttWanted= math.mod(timeRangeAttWanted+24, 24);
+		timeRangeAtt= math.fmod(timeRangeAtt+24, 24);
+		timeRangeAttWanted= math.fmod(timeRangeAttWanted+24, 24);
 
 		-- if time required is the one obtained
 		if( timeRangeAtt == timeRangeAttWanted ) then
diff --git a/code/ryzom/client/data/gamedev/interfaces_v3/player.lua b/code/ryzom/client/data/gamedev/interfaces_v3/player.lua
index c1abe7b22..062f09690 100644
--- a/code/ryzom/client/data/gamedev/interfaces_v3/player.lua
+++ b/code/ryzom/client/data/gamedev/interfaces_v3/player.lua
@@ -803,8 +803,8 @@ end
 
 
 function game:timeInSecondsToReadableTime(regenTime)			
-	local seconds = math.mod(regenTime, 60)	
-	local minutes = math.mod(math.floor(regenTime / 60), 60)	
+	local seconds = math.fmod(regenTime, 60)	
+	local minutes = math.fmod(math.floor(regenTime / 60), 60)	
 	local hours = math.floor(regenTime / 3600)	
 	local result = ""
 	if seconds > 0 then result = concatUCString(tostring(seconds), i18n.get("uittSecondsShort"))	end
diff --git a/code/ryzom/client/data/gamedev/interfaces_v3/ring_access_point.lua b/code/ryzom/client/data/gamedev/interfaces_v3/ring_access_point.lua
index d07f5abee..ca04561f1 100644
--- a/code/ryzom/client/data/gamedev/interfaces_v3/ring_access_point.lua
+++ b/code/ryzom/client/data/gamedev/interfaces_v3/ring_access_point.lua
@@ -904,7 +904,7 @@ function RingAccessPoint:onDraw()
 			self.LastRefreshTime = nltime.getLocalTime() / 1000
 			--self:getWindow():find("refreshText").active = false
 		else		
-			local waitText = i18n.get("uiRAP_WaitMsg" .. math.mod(os.time(), 3))
+			local waitText = i18n.get("uiRAP_WaitMsg" .. math.fmod(os.time(), 3))
 			self:setInfoMessage(waitText)			
 			--local refreshText = self:getWindow():find("refreshText")
 			--if not self.ListReceived then