diff --git a/src/Airports/simple.cxx b/src/Airports/simple.cxx
index c7e486f45..7eceffe5b 100644
--- a/src/Airports/simple.cxx
+++ b/src/Airports/simple.cxx
@@ -143,7 +143,10 @@ FGRunway* FGAirport::getRunwayByIdent(const string& aIdent) const
 
 FGAirport::Runway_iterator
 FGAirport::getIteratorForRunwayIdent(const string& aIdent) const
-{ 
+{
+  if (aIdent.empty())
+    return mRunways.end();
+
   loadRunways();
   
   string ident(aIdent);
diff --git a/src/Instrumentation/HUD/HUD.cxx b/src/Instrumentation/HUD/HUD.cxx
index 4a7d6a542..eace97cc0 100644
--- a/src/Instrumentation/HUD/HUD.cxx
+++ b/src/Instrumentation/HUD/HUD.cxx
@@ -137,6 +137,8 @@ void HUD::init()
     _font_renderer->setPointSize(_font_size);
     _text_list.setFont(_font_renderer);
 
+    currentColorChanged();
+    
     _path->fireValueChanged();
 }
 
@@ -446,29 +448,9 @@ void HUD::valueChanged(SGPropertyNode *node)
         load(fgGetString("/sim/hud/path[1]", "Huds/default.xml"));
 
     if (!strcmp(node->getName(), "current-color")) {
-        int i = node->getIntValue();
-        if (i < 0)
-            i = 0;
-        SGPropertyNode *n = fgGetNode("/sim/hud/palette", true);
-        if ((n = n->getChild("color", i, false))) {
-            if (n->hasValue("red"))
-                _red->setFloatValue(n->getFloatValue("red", 1.0));
-            if (n->hasValue("green"))
-                _green->setFloatValue(n->getFloatValue("green", 1.0));
-            if (n->hasValue("blue"))
-                _blue->setFloatValue(n->getFloatValue("blue", 1.0));
-            if (n->hasValue("alpha"))
-                _alpha->setFloatValue(n->getFloatValue("alpha", 0.67));
-            if (n->hasValue("alpha-clamp"))
-                _alpha_clamp->setFloatValue(n->getFloatValue("alpha-clamp", 0.01));
-            if (n->hasValue("brightness"))
-                _brightness->setFloatValue(n->getFloatValue("brightness", 0.75));
-            if (n->hasValue("antialiased"))
-                _antialiasing->setBoolValue(n->getBoolValue("antialiased", false));
-            if (n->hasValue("transparent"))
-                _transparency->setBoolValue(n->getBoolValue("transparent", false));
-        }
+        currentColorChanged();
     }
+    
     _scr_width = _scr_widthN->getIntValue();
     _scr_height = _scr_heightN->getIntValue();
 
@@ -487,6 +469,36 @@ void HUD::valueChanged(SGPropertyNode *node)
     _listener_active = false;
 }
 
+void HUD::currentColorChanged()
+{
+  SGPropertyNode *n = fgGetNode("/sim/hud/palette", true);
+  int index = _current->getIntValue();
+  if (index < 0) {
+    index = 0;
+  }
+  
+  n = n->getChild("color", index, false);
+  if (!n) {
+    return;
+  }
+  
+  if (n->hasValue("red"))
+      _red->setFloatValue(n->getFloatValue("red", 1.0));
+  if (n->hasValue("green"))
+      _green->setFloatValue(n->getFloatValue("green", 1.0));
+  if (n->hasValue("blue"))
+      _blue->setFloatValue(n->getFloatValue("blue", 1.0));
+  if (n->hasValue("alpha"))
+      _alpha->setFloatValue(n->getFloatValue("alpha", 0.67));
+  if (n->hasValue("alpha-clamp"))
+      _alpha_clamp->setFloatValue(n->getFloatValue("alpha-clamp", 0.01));
+  if (n->hasValue("brightness"))
+      _brightness->setFloatValue(n->getFloatValue("brightness", 0.75));
+  if (n->hasValue("antialiased"))
+      _antialiasing->setBoolValue(n->getBoolValue("antialiased", false));
+  if (n->hasValue("transparent"))
+      _transparency->setBoolValue(n->getBoolValue("transparent", false));
+}
 
 void HUD::setColor() const
 {
diff --git a/src/Instrumentation/HUD/HUD.hxx b/src/Instrumentation/HUD/HUD.hxx
index 3408e54c5..8539330f1 100644
--- a/src/Instrumentation/HUD/HUD.hxx
+++ b/src/Instrumentation/HUD/HUD.hxx
@@ -202,6 +202,8 @@ private:
     void draw3D();
     void draw2D(GLfloat, GLfloat, GLfloat, GLfloat);
 
+    void currentColorChanged();
+    
     class Input;
     class Item;
     class Label;
diff --git a/src/Main/CameraGroup.cxx b/src/Main/CameraGroup.cxx
index 305c68363..1c0bb6cca 100644
--- a/src/Main/CameraGroup.cxx
+++ b/src/Main/CameraGroup.cxx
@@ -162,7 +162,7 @@ CameraInfo* CameraGroup::addCamera(unsigned flags, Camera* camera,
         if (bufferMap.count(Camera::COLOR_BUFFER) != 0) {
             farCamera->attach(
                 Camera::COLOR_BUFFER,
-                bufferMap.find(Camera::COLOR_BUFFER)->second._texture);
+                bufferMap.find(Camera::COLOR_BUFFER)->second._texture.get());
         }
         _viewer->addSlave(farCamera, projection, view, useMasterSceneData);
         installCullVisitor(farCamera);
diff --git a/src/Main/globals.cxx b/src/Main/globals.cxx
index 2e72e8276..c560f2765 100644
--- a/src/Main/globals.cxx
+++ b/src/Main/globals.cxx
@@ -35,6 +35,7 @@
 #include <simgear/structure/event_mgr.hxx>
 #include <simgear/sound/soundmgr_openal.hxx>
 #include <simgear/misc/ResourceManager.hxx>
+#include <simgear/props/propertyObject.hxx>
 
 #include <Aircraft/controls.hxx>
 #include <Airports/runways.hxx>
@@ -148,6 +149,7 @@ FGGlobals::FGGlobals() :
     channellist( NULL )    
 {
   simgear::ResourceManager::instance()->addProvider(new AircraftResourceProvider());
+  simgear::PropertyObjectBase::setDefaultRoot(props);
 }
 
 
diff --git a/src/Navaids/waypoint.cxx b/src/Navaids/waypoint.cxx
index 5992774b1..12cee7744 100644
--- a/src/Navaids/waypoint.cxx
+++ b/src/Navaids/waypoint.cxx
@@ -39,6 +39,9 @@ BasicWaypt::BasicWaypt(const SGGeod& aPos, const string& aIdent, Route* aOwner)
   _pos(aPos),
   _ident(aIdent)
 {
+  if (aPos.getElevationFt() > -999.0) {
+    setAltitude(aPos.getElevationFt(), RESTRICT_AT);
+  }
 }
 
 BasicWaypt::BasicWaypt(const SGWayPoint& aWP, Route* aOwner) :
diff --git a/src/Traffic/Schedule.cxx b/src/Traffic/Schedule.cxx
index 3b8e7636d..cb7fafb3d 100644
--- a/src/Traffic/Schedule.cxx
+++ b/src/Traffic/Schedule.cxx
@@ -187,9 +187,6 @@ bool FGAISchedule::init()
 
 bool FGAISchedule::update(time_t now, const SGVec3d& userCart)
 { 
-  if (!fgGetBool("/sim/traffic-manager/enabled"))
-    return true;
-  
   time_t 
     totalTimeEnroute, 
     elapsedTimeEnroute,
diff --git a/src/Traffic/TrafficMgr.cxx b/src/Traffic/TrafficMgr.cxx
index d9fcb6fff..765c870fd 100644
--- a/src/Traffic/TrafficMgr.cxx
+++ b/src/Traffic/TrafficMgr.cxx
@@ -75,7 +75,11 @@ using std::strcmp;
 /******************************************************************************
  * TrafficManager
  *****************************************************************************/
-FGTrafficManager::FGTrafficManager()
+FGTrafficManager::FGTrafficManager() :
+  inited(false),
+  enabled("/sim/traffic-manager/enabled"),
+  aiEnabled("/sim/ai/enabled"),
+  metarValid("/environment/metar/valid")
 {
     //score = 0;
     //runCount = 0;
@@ -125,6 +129,10 @@ FGTrafficManager::~FGTrafficManager()
 
 void FGTrafficManager::init()
 {
+    if (!enabled || !aiEnabled) {
+      return;
+    }
+  
     heuristicsVector heuristics;
     HeuristicMap heurMap;
 
@@ -218,13 +226,22 @@ void FGTrafficManager::init()
          compareSchedules);
     currAircraft = scheduledAircraft.begin();
     currAircraftClosest = scheduledAircraft.begin();
+    
+    inited = true;
 }
 
 void FGTrafficManager::update(double /*dt */ )
 {
-    if (fgGetBool("/environment/metar/valid") == false) {
+    if (!enabled || !aiEnabled || !metarValid) {
         return;
     }
+        
+    if (!inited) {
+    // lazy-initialization, we've been enabled at run-time
+      SG_LOG(SG_GENERAL, SG_INFO, "doing lazy-init of TrafficManager");
+      init();
+    }
+        
     time_t now = time(NULL) + fgGetLong("/sim/time/warp");
     if (scheduledAircraft.size() == 0) {
         return;
diff --git a/src/Traffic/TrafficMgr.hxx b/src/Traffic/TrafficMgr.hxx
index 862c87be4..a9bb9a305 100644
--- a/src/Traffic/TrafficMgr.hxx
+++ b/src/Traffic/TrafficMgr.hxx
@@ -47,6 +47,7 @@
 #define _TRAFFICMGR_HXX_
 
 #include <simgear/structure/subsystem_mgr.hxx>
+#include <simgear/props/propertyObject.hxx>
 #include <simgear/xml/easyxml.hxx>
 #include <simgear/misc/sg_path.hxx>
 
@@ -54,19 +55,19 @@
 #include "Schedule.hxx"
 
 
-typedef vector<int> IdList;
-typedef vector<int>::iterator IdListIterator;
+typedef std::vector<int> IdList;
+typedef std::vector<int>::iterator IdListIterator;
 
 class Heuristic
 {
 public:
-   string registration;
+   std::string registration;
    unsigned int runCount;
    unsigned int hits;
 };
 
-typedef vector<Heuristic> heuristicsVector;
-typedef vector<Heuristic>::iterator heuristicsVectorIterator;
+typedef std::vector<Heuristic> heuristicsVector;
+typedef std::vector<Heuristic>::iterator heuristicsVectorIterator;
 
 typedef std::map < std::string, Heuristic> HeuristicMap;
 typedef HeuristicMap::iterator             HeuristicMapIterator;
@@ -77,11 +78,13 @@ typedef HeuristicMap::iterator             HeuristicMapIterator;
 class FGTrafficManager : public SGSubsystem, public XMLVisitor
 {
 private:
+  bool inited;
+  
   ScheduleVector scheduledAircraft;
   ScheduleVectorIterator currAircraft, currAircraftClosest;
   vector<string> elementValueStack;
 
-  string mdl, livery, registration, callsign, fltrules, 
+  std::string mdl, livery, registration, callsign, fltrules, 
     port, timeString, departurePort, departureTime, arrivalPort, arrivalTime,
     repeat, acType, airline, m_class, flighttype, requiredAircraft, homePort;
   int cruiseAlt;
@@ -96,6 +99,7 @@ private:
   void readTimeTableFromFile(SGPath infilename);
   void Tokenize(const string& str, vector<string>& tokens, const string& delimiters = " ");
 
+  simgear::PropertyObject<bool> enabled, aiEnabled, metarValid;
 public:
   FGTrafficManager();
   ~FGTrafficManager();