diff --git a/Aquaria/Element.cpp b/Aquaria/Element.cpp
index ffa9b87..18af377 100644
--- a/Aquaria/Element.cpp
+++ b/Aquaria/Element.cpp
@@ -42,7 +42,7 @@ Element::Element() : Quad()
 	elementFlag = EF_NONE;
 	elementActive = true;
 	bgLayer = 0;
-	templateIdx = ~0UL;
+	templateIdx = -1;
 	eff = NULL;
 
 	setStatic(true);
diff --git a/Aquaria/Game.cpp b/Aquaria/Game.cpp
index ac7434e..f6802e8 100644
--- a/Aquaria/Game.cpp
+++ b/Aquaria/Game.cpp
@@ -1049,7 +1049,7 @@ int Game::getNumberOfEntitiesNamed(const std::string &name)
 
 void Game::playSongInMenu(size_t songType, bool override)
 {
-	if (playingSongInMenu == ~0UL || override)
+	if (playingSongInMenu == -1 || override)
 	{
 		playingSongInMenu = songType;
 		currentSongMenuNote = 0;
@@ -6091,7 +6091,7 @@ void Game::action(int id, int state)
 						}
 						if (trashIndex >= 0)
 						{
-							size_t ingrIndex = ~0UL;
+							size_t ingrIndex = -1;
 							for (size_t i = 0; i < foodSlots.size(); i++)
 							{
 								if (foodSlots[i]->isCursorIn() && foodSlots[i]->getIngredient())
@@ -6100,7 +6100,7 @@ void Game::action(int id, int state)
 									break;
 								}
 							}
-							if (ingrIndex != ~0UL)
+							if (ingrIndex != -1)
 							{
 								foodSlots[ingrIndex]->discard();
 							}
@@ -9621,7 +9621,7 @@ void Game::updateInGameMenu(float dt)
 		}
 		// HACK: move this later
 		updateOptionsMenu(dt);
-		if (playingSongInMenu != ~0UL)
+		if (playingSongInMenu != -1)
 		{
 			songMenuPlayDelay += dt;
 
diff --git a/Aquaria/ModSelector.cpp b/Aquaria/ModSelector.cpp
index 1542c06..db76af8 100644
--- a/Aquaria/ModSelector.cpp
+++ b/Aquaria/ModSelector.cpp
@@ -46,7 +46,7 @@ ModSelectorScreen::ModSelectorScreen()
 	, ActionMapper()
 	, dlText(&dsq->smallFont)
 	, gotServerList(false)
-	, currentPanel(~0)
+	, currentPanel(-1)
 	, subtext(&dsq->subsFont)
 {
 	followCamera = 1;
@@ -140,7 +140,7 @@ void ModSelectorScreen::showPanel(size_t id)
 	IconGridPanel *newgrid = panels[id];
 
 	// fade in selected panel
-	if(currentPanel == ~0U) // just bringing up?
+	if(currentPanel == -1) // just bringing up?
 	{
 		newgrid->scale = Vector(0.8f,0.8f);
 		newgrid->alpha = 0;
diff --git a/Aquaria/SceneEditor.cpp b/Aquaria/SceneEditor.cpp
index df1f5ba..fc1ecbf 100644
--- a/Aquaria/SceneEditor.cpp
+++ b/Aquaria/SceneEditor.cpp
@@ -145,7 +145,7 @@ void WarpAreaRender::onRender()
 SceneEditor::SceneEditor() : ActionMapper(), on(false)
 {
 	autoSaveFile = 0;
-	selectedIdx = ~0UL;
+	selectedIdx = -1;
 }
 
 void SceneEditor::setBackgroundGradient()
@@ -945,7 +945,7 @@ void SceneEditor::moveToBack()
 
 void SceneEditor::editModeElements()
 {
-	selectedIdx = ~0UL;
+	selectedIdx = -1;
 	editType = ET_ELEMENTS;
 	if (curElement < dsq->game->elementTemplates.size())
 	{
@@ -960,7 +960,7 @@ void SceneEditor::editModeElements()
 
 void SceneEditor::editModeEntities()
 {
-	selectedIdx = ~0UL;
+	selectedIdx = -1;
 	//HACK: methinks target is useless now
 	//target->alpha.interpolateTo(0, 0.5);
 	editType = ET_ENTITIES;
@@ -976,7 +976,7 @@ void SceneEditor::editModeEntities()
 
 void SceneEditor::editModePaths()
 {
-	selectedIdx = ~0UL;
+	selectedIdx = -1;
 	editType = ET_PATHS;
 	placer->alpha = 0;
 	pathRender->alpha = 0.5;
@@ -1074,13 +1074,13 @@ void SceneEditor::deleteSelected()
 		}
 		else
 		{
-			if (selectedIdx != ~0UL)
+			if (selectedIdx != -1)
 			{
 				Path *p = dsq->game->getPath(selectedIdx);
 				if (p->nodes.size() == 1)
 				{
 					dsq->game->removePath(selectedIdx);
-					selectedIdx = ~0UL;
+					selectedIdx = -1;
 				}
 				else
 					p->removeNode(selectedNode);
@@ -1464,7 +1464,7 @@ void SceneEditor::mouseButtonLeft()
 	}
 	else if (editType == ET_PATHS)
 	{
-		if (selectedIdx != ~0UL)
+		if (selectedIdx != -1)
 		{
 			Path *p = getSelectedPath();
 			editingPath = p;
@@ -1498,7 +1498,7 @@ void SceneEditor::mouseButtonRight()
 	}
 	if (editType == ET_PATHS)
 	{
-		if (selectedIdx != ~0UL)
+		if (selectedIdx != -1)
 		{
 			debugLog("path scaling HERE!");
 			Path *p = dsq->game->getPath(selectedIdx);
@@ -2189,7 +2189,7 @@ void SceneEditor::saveScene()
 void SceneEditor::deleteSelectedElement()
 {
 	deleteElement(selectedIdx);
-	selectedIdx = ~0UL;
+	selectedIdx = -1;
 }
 
 void SceneEditor::deleteElement(int selectedIdx)
@@ -2421,7 +2421,7 @@ Element* SceneEditor::cycleElementPrev(Element *e1)
 	}
 	ce = idx;
 	ce--;
-	if (ce == ~0UL)
+	if (ce == -1)
 		ce = dsq->game->elementTemplates.size()-1;
 	idx = dsq->game->elementTemplates[ce].idx;
 	if (idx < 1024)
@@ -3060,8 +3060,8 @@ void SceneEditor::update(float dt)
 			{
 			case ES_SELECTING:
 			{
-				selectedIdx = ~0UL;
-				selectedNode = ~0UL;
+				selectedIdx = -1;
+				selectedNode = -1;
 				float smallestDist = sqr(64);
 				for (size_t i = 0; i < dsq->game->getNumPaths(); i++)
 				{
diff --git a/BBGE/ParticleManager.cpp b/BBGE/ParticleManager.cpp
index ac67281..88f3a8a 100644
--- a/BBGE/ParticleManager.cpp
+++ b/BBGE/ParticleManager.cpp
@@ -216,7 +216,7 @@ void ParticleManager::prevFree(int jump)
 
 void ParticleManager::setFree(size_t free)
 {
-	if (free != ~0UL)
+	if (free != -1)
 	{
 		this->free = free;
 	}
diff --git a/BBGE/RenderObjectLayer.cpp b/BBGE/RenderObjectLayer.cpp
index d339d07..bc50580 100644
--- a/BBGE/RenderObjectLayer.cpp
+++ b/BBGE/RenderObjectLayer.cpp
@@ -101,7 +101,7 @@ void RenderObjectLayer::remove(RenderObject* r)
 	objectCount--;
 	if (idx < firstFreeIdx)
 		firstFreeIdx = idx;
-	r->setIdx(~0UL);
+	r->setIdx(-1);
 
 	clearDisplayList();
 }
diff --git a/BBGE/SkeletalSprite.cpp b/BBGE/SkeletalSprite.cpp
index bc726b7..597605b 100644
--- a/BBGE/SkeletalSprite.cpp
+++ b/BBGE/SkeletalSprite.cpp
@@ -487,7 +487,7 @@ void AnimationLayer::setSkeletalSprite(SkeletalSprite *s)
 
 Animation* AnimationLayer::getCurrentAnimation()
 {
-	if (currentAnimation == ~0UL)
+	if (currentAnimation == -1)
 		return &blendAnimation;
 	if (currentAnimation >= s->animations.size())
 	{
@@ -652,7 +652,7 @@ size_t Animation::getSkeletalKeyframeIndex(SkeletalKeyframe *skey)
 		if (&keyframes[i] == skey)
 			return i;
 	}
-	return ~0UL;
+	return -1;
 }
 
 BoneKeyframe *SkeletalKeyframe::getBoneKeyframe(size_t idx)
@@ -669,7 +669,7 @@ BoneKeyframe *SkeletalKeyframe::getBoneKeyframe(size_t idx)
 
 SkeletalKeyframe *Animation::getPrevKeyframe(float t)
 {
-	size_t kf = ~0UL;
+	size_t kf = -1;
 	for (size_t i = keyframes.size(); i-- > 0; )
 	{
 		if (t >= keyframes[i].t)
@@ -678,7 +678,7 @@ SkeletalKeyframe *Animation::getPrevKeyframe(float t)
 			break;
 		}
 	}
-	if (kf == ~0UL)
+	if (kf == -1)
 		return 0;
 	if (kf >= keyframes.size())
 		kf = keyframes.size()-1;
@@ -687,7 +687,7 @@ SkeletalKeyframe *Animation::getPrevKeyframe(float t)
 
 SkeletalKeyframe *Animation::getNextKeyframe(float t)
 {
-	size_t kf = ~0UL;
+	size_t kf = -1;
 	for (size_t i = 0; i < keyframes.size(); i++)
 	{
 		if (t <= keyframes[i].t)
@@ -697,7 +697,7 @@ SkeletalKeyframe *Animation::getNextKeyframe(float t)
 		}
 	}
 
-	if (kf == ~0UL)
+	if (kf == -1)
 		return 0;
 	if (kf >= keyframes.size())
 		kf = keyframes.size()-1;
@@ -1011,7 +1011,7 @@ size_t SkeletalSprite::getBoneIdx(Bone *b)
 		if (bones[i] == b)
 			return i;
 	}
-	return ~0UL;
+	return -1;
 }
 
 void SkeletalSprite::toggleBone(size_t idx, int v)
diff --git a/BBGE/Texture.cpp b/BBGE/Texture.cpp
index edc50b9..92dfbc4 100644
--- a/BBGE/Texture.cpp
+++ b/BBGE/Texture.cpp
@@ -156,7 +156,7 @@ int Texture::getPixelWidth()
 	if (!data)
 		return 0;
 
-	size_t smallestx = ~0UL, largestx = 0;
+	size_t smallestx = -1, largestx = 0;
 	for (unsigned int x = 0; x < unsigned(w); x++)
 	{
 		for (unsigned int y = 0; y < unsigned(h); y++)
@@ -183,7 +183,7 @@ int Texture::getPixelHeight()
 	if (!data)
 		return 0;
 
-	size_t smallesty = ~0UL, largesty = 0;
+	size_t smallesty = -1, largesty = 0;
 	for (unsigned int x = 0; x < unsigned(w); x++)
 	{
 		for (unsigned int y = 0; y < unsigned(h); y++)