diff --git a/src/game/GameController.cpp b/src/game/GameController.cpp
index e029fc9ef..07f2722a1 100644
--- a/src/game/GameController.cpp
+++ b/src/game/GameController.cpp
@@ -54,7 +54,7 @@ void GameController::DrawPoints(queue<ui::Point*> & pointQueue)
 
 void GameController::Tick()
 {
-	gameModel->GetSimulation()->update_particles();
+	//gameModel->GetSimulation()->update_particles();
 }
 
 void GameController::SetPaused(bool pauseState)
diff --git a/src/game/GameModel.cpp b/src/game/GameModel.cpp
index 3d5a800aa..50f266fa4 100644
--- a/src/game/GameModel.cpp
+++ b/src/game/GameModel.cpp
@@ -5,7 +5,9 @@
 #include "Renderer.h"
 
 GameModel::GameModel():
-	activeElement(1)
+	activeElement(1),
+	sim(NULL),
+	ren(NULL)
 {
 	sim = new Simulation();
 	ren = new Renderer(ui::Engine::Ref().g, sim);
diff --git a/src/interface/Button.cpp b/src/interface/Button.cpp
index 783c29747..659aeed7c 100644
--- a/src/interface/Button.cpp
+++ b/src/interface/Button.cpp
@@ -21,6 +21,7 @@ Button::Button(Window* parent_state, std::string buttonText):
 	isMouseInside(false),
 	isButtonDown(false),
 	isTogglable(false),
+	toggle(false),
 	actionCallback(NULL),
 	textPosition(ui::Point(0, 0)),
 	textVAlign(AlignMiddle),
@@ -35,6 +36,7 @@ Button::Button(Point position, Point size, std::string buttonText):
 	isMouseInside(false),
 	isButtonDown(false),
 	isTogglable(false),
+	toggle(false),
 	actionCallback(NULL),
 	textPosition(ui::Point(0, 0)),
 	textVAlign(AlignMiddle),
@@ -49,6 +51,7 @@ Button::Button(std::string buttonText):
 	isMouseInside(false),
 	isButtonDown(false),
 	isTogglable(false),
+	toggle(false),
 	actionCallback(NULL),
 	textPosition(ui::Point(0, 0)),
 	textVAlign(AlignMiddle),
diff --git a/src/interface/Window.cpp b/src/interface/Window.cpp
index e28d34bed..ca29be0db 100644
--- a/src/interface/Window.cpp
+++ b/src/interface/Window.cpp
@@ -7,7 +7,8 @@ using namespace ui;
 Window::Window(Point _position, Point _size):
 	Position(_position),
 	Size(_size),
-	focusedComponent_(NULL)
+	focusedComponent_(NULL),
+	AllowExclusiveDrawing(true)
 {
 }
 
diff --git a/src/simulation/Air.cpp b/src/simulation/Air.cpp
index b3826ab2d..3c88e91bb 100644
--- a/src/simulation/Air.cpp
+++ b/src/simulation/Air.cpp
@@ -117,8 +117,8 @@ void Air::update_airh(void)
 
 void Air::update_air(void)
 {
-	int x, y, i, j;
-	float dp, dx, dy, f, tx, ty;
+	int x = 0, y = 0, i = 0, j = 0;
+	float dp = 0.0f, dx = 0.0f, dy = 0.0f, f = 0.0f, tx = 0.0f, ty = 0.0f;
 
 	for (y=0; y<YRES/CELL; y++)
 		for (x=0; x<XRES/CELL; x++)
@@ -294,7 +294,8 @@ void Air::update_air(void)
 		memcpy(pv, opv, sizeof(pv));
 	}
 }
-Air::Air()
+Air::Air():
+	airMode(0)
 {
 	//Simulation should do this.
 	make_kernel();
diff --git a/src/simulation/Simulation.cpp b/src/simulation/Simulation.cpp
index 96b9d448a..f7dec7998 100644
--- a/src/simulation/Simulation.cpp
+++ b/src/simulation/Simulation.cpp
@@ -3222,6 +3222,8 @@ Simulation::Simulation()
 	pv = air->pv;
 	hv = air->hv;
 
+	signs = (sign*)calloc(MAXSIGNS, sizeof(sign));
+
 	//ptypes[0] = {"",		PIXPACK(0x000000),	0.0f,	0.00f * CFDS,	1.00f,	0.00f,	0.0f,	0.0f,	0.00f,	0.000f	* CFDS,	0,	0,		0,	0,	1,	1,	1,	100,	0,		R_TEMP+0.0f	+273.15f,	251,	"Erases particles.", ST_NONE, 0, NULL, NULL};
 	//ptypes[1] = {"DUST",	PIXPACK(0xFFE0A0),	0.7f,	0.02f * CFDS,	0.96f,	0.80f,	0.0f,	0.1f,	0.00f,	0.000f	* CFDS,	1,	10,		0,	0,	30,	1,	1,	85,		0,		R_TEMP+0.0f	+273.15f,	70,		"Very light dust. Flammable.", ST_SOLID, TYPE_PART|PROP_LIFE_DEC|PROP_LIFE_KILL_DEC, NULL, &graphics_DUST};
 	//ptypes[2] = {"WATR",	PIXPACK(0x2030D0),	0.6f,	0.01f * CFDS,	0.98f,	0.95f,	0.0f,	0.1f,	0.00f,	0.000f	* CFDS,	2,	0,		0,	0,	20,	1,	1,	30,		0,		R_TEMP-2.0f	+273.15f,	29,		"Liquid. Conducts electricity. Freezes. Extinguishes fires.", ST_LIQUID, TYPE_LIQUID|PROP_CONDUCTS|PROP_LIFE_DEC|PROP_NEUTPENETRATE, &update_WATR, NULL};