diff --git a/code/nel/src/sound/driver/source.cpp b/code/nel/src/sound/driver/source.cpp
index 7c422b701..0a2090d29 100644
--- a/code/nel/src/sound/driver/source.cpp
+++ b/code/nel/src/sound/driver/source.cpp
@@ -25,12 +25,15 @@ namespace NLSOUND
 // common method used only with OptionManualRolloff. return the volume in 1/100th DB ( = mB) modified
 sint32 ISource::computeManualRollOff(sint32 volumeMB, sint32 mbMin, sint32 mbMax, double alpha, float sqrdist, float distMin, float distMax)
 {
+	// root square of max float value
+	static float maxSqrt = sqrt(std::numeric_limits<float>::max());
+
 	if (sqrdist < distMin * distMin)
 	{
 		// no attenuation
 		return volumeMB;
 	}
-	else if (sqrdist > distMax * distMax)
+	else if ((distMax < maxSqrt) && (sqrdist > distMax * distMax))
 	{
 		// full attenuation
 		return mbMin;
diff --git a/code/ryzom/client/src/main_loop.cpp b/code/ryzom/client/src/main_loop.cpp
index 4ebb7ad9b..7c9084b95 100644
--- a/code/ryzom/client/src/main_loop.cpp
+++ b/code/ryzom/client/src/main_loop.cpp
@@ -322,7 +322,7 @@ std::string			DebugUIFilter;
 bool				ShowHelp = false;	// Do the Help have to be displayed.
 uint8				ShowInfos = 0;		// 0=no info 1=text info 2=graph info
 
-bool				bZeroCpu = 0;	// For no Cpu use if application is minimize  TODO: intercept minimize message, called by CTRL + Z at this
+bool				bZeroCpu = false;	// For no Cpu use if application is minimize  TODO: intercept minimize message, called by CTRL + Z at this
 
 bool				Profiling = false;			// Are we in Profile mode?
 uint				ProfileNumFrame = 0;
@@ -2287,8 +2287,11 @@ bool mainLoop()
 					smoothFPS.addValue((float)deltaTime);
 					moreSmoothFPS.addValue((float)deltaTime);
 					deltaTime = smoothFPS.getSmoothValue ();
-					CCDBNodeLeaf*pNL = pIMinstance->getDbProp("UI:VARIABLES:FPS");
-					pNL->setValue64((sint64)(1.f/deltaTime));
+					if (deltaTime > 0.0)
+					{
+						CCDBNodeLeaf*pNL = pIMinstance->getDbProp("UI:VARIABLES:FPS");
+						pNL->setValue64((sint64)(1.f/deltaTime));
+					}
 				}
 
 				// Detect disconnection / server down: display information text