diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 076f9e50a..bff1a36e3 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1244,11 +1244,14 @@ endif()
 
 if( MSVC )
 	option( ZDOOM_GENERATE_MAPFILE "Generate .map file for debugging." OFF )
+	set( LINKERSTUFF "/MANIFEST:NO /DELAYLOAD:\"fmodex${X64}.dll\"" )
 	if( ZDOOM_GENERATE_MAPFILE )
-		set_target_properties(zdoom PROPERTIES LINK_FLAGS "/MANIFEST:NO /DELAYLOAD:\"fmodex${X64}.dll\" /DELAYLOAD:\"libmpg123-0.dll\" /DELAYLOAD:\"libsndfile-1.dll\" /MAP")
-	else()
-		set_target_properties(zdoom PROPERTIES LINK_FLAGS "/MANIFEST:NO /DELAYLOAD:\"fmodex${X64}.dll\" /DELAYLOAD:\"libmpg123-0.dll\" /DELAYLOAD:\"libsndfile-1.dll\"")
+		set( LINKERSTUFF ${LINKERSTUFF} "/MAP" )
 	endif()
+	if( NOT NO_OPENAL )
+		set( LINKERSTUFF ${LINKERSTUFF} "/DELAYLOAD:\"libmpg123-0.dll\" /DELAYLOAD:\"libsndfile-1.dll\"" )
+	endif()
+	set_target_properties(zdoom PROPERTIES LINK_FLAGS ${LINKERSTUFF})
 
 	add_custom_command(TARGET zdoom POST_BUILD
 		COMMAND "mt.exe" -manifest \"${CMAKE_CURRENT_SOURCE_DIR}\\win32\\zdoom.exe.manifest\" -outputresource:\"$<TARGET_FILE:zdoom>\"\;\#1
diff --git a/src/menu/joystickmenu.cpp b/src/menu/joystickmenu.cpp
index 676bc1767..90c2b0c4e 100644
--- a/src/menu/joystickmenu.cpp
+++ b/src/menu/joystickmenu.cpp
@@ -225,7 +225,7 @@ public:
 
 	void SetSelection(int Selection)
 	{
-		float f = fabs(SELECTED_JOYSTICK->GetAxisScale(mAxis));
+		float f = fabsf(SELECTED_JOYSTICK->GetAxisScale(mAxis));
 		if (Selection) f*=-1;
 		SELECTED_JOYSTICK->SetAxisScale(mAxis, f);
 	}
diff --git a/src/p_user.cpp b/src/p_user.cpp
index 9f5a37293..0427bd64f 100644
--- a/src/p_user.cpp
+++ b/src/p_user.cpp
@@ -2305,7 +2305,7 @@ void P_PlayerThink (player_t *player)
 	{
 		// A negative scale is used to prevent G_AddViewAngle/G_AddViewPitch
 		// from scaling with the FOV scale.
-		desired *= fabs(player->ReadyWeapon->FOVScale);
+		desired *= fabsf(player->ReadyWeapon->FOVScale);
 	}
 	if (player->FOV != desired)
 	{
diff --git a/src/sound/fmodsound.cpp b/src/sound/fmodsound.cpp
index e7a617f5a..1b9dcfda9 100644
--- a/src/sound/fmodsound.cpp
+++ b/src/sound/fmodsound.cpp
@@ -2311,9 +2311,9 @@ void FMODSoundRenderer::UpdateListener(SoundListener *listener)
 	pos.z = listener->position.Z;
 
 	float angle = listener->angle;
-	forward.x = cos(angle);
+	forward.x = cosf(angle);
 	forward.y = 0;
-	forward.z = sin(angle);
+	forward.z = sinf(angle);
 
 	up.x = 0;
 	up.y = 1;
diff --git a/src/sound/music_win_mididevice.cpp b/src/sound/music_win_mididevice.cpp
index 151728662..38fa18c59 100644
--- a/src/sound/music_win_mididevice.cpp
+++ b/src/sound/music_win_mididevice.cpp
@@ -175,7 +175,7 @@ int WinMIDIDevice::GetTechnology() const
 
 int WinMIDIDevice::SetTempo(int tempo)
 {
-	MIDIPROPTEMPO data = { sizeof(MIDIPROPTEMPO), tempo };
+	MIDIPROPTEMPO data = { sizeof(MIDIPROPTEMPO), (DWORD)tempo };
 	return midiStreamProperty(MidiOut, (LPBYTE)&data, MIDIPROP_SET | MIDIPROP_TEMPO);
 }
 
@@ -187,7 +187,7 @@ int WinMIDIDevice::SetTempo(int tempo)
 
 int WinMIDIDevice::SetTimeDiv(int timediv)
 {
-	MIDIPROPTIMEDIV data = { sizeof(MIDIPROPTIMEDIV), timediv };
+	MIDIPROPTIMEDIV data = { sizeof(MIDIPROPTIMEDIV), (DWORD)timediv };
 	return midiStreamProperty(MidiOut, (LPBYTE)&data, MIDIPROP_SET | MIDIPROP_TIMEDIV);
 }
 
diff --git a/src/tflags.h b/src/tflags.h
index 48866c828..81e54e3bb 100644
--- a/src/tflags.h
+++ b/src/tflags.h
@@ -42,7 +42,7 @@
  * T is the enum type of individual flags,
  * TT is the underlying integer type used (defaults to DWORD)
  */
-template<typename T, typename TT = DWORD>
+template<typename T, typename TT = uint32>
 class TFlags
 {
 	struct ZeroDummy {};
diff --git a/src/thingdef/thingdef_codeptr.cpp b/src/thingdef/thingdef_codeptr.cpp
index a3e4ac6fa..70a6d96ec 100644
--- a/src/thingdef/thingdef_codeptr.cpp
+++ b/src/thingdef/thingdef_codeptr.cpp
@@ -5553,7 +5553,7 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_DropItem)
 DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_SetSpeed)
 {
 	PARAM_ACTION_PROLOGUE;
-	PARAM_INT(speed);
+	PARAM_FIXED(speed);
 	PARAM_INT_OPT(ptr)	{ ptr = AAPTR_DEFAULT; }
 
 	AActor *ref = COPY_AAPTR(self, ptr);
@@ -5573,7 +5573,7 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_SetSpeed)
 DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_SetFloatSpeed)
 {
 	PARAM_ACTION_PROLOGUE;
-	PARAM_INT(speed);
+	PARAM_FIXED(speed);
 	PARAM_INT_OPT(ptr)	{ ptr = AAPTR_DEFAULT; }
 
 	AActor *ref = COPY_AAPTR(self, ptr);
diff --git a/src/thingdef/thingdef_expression.cpp b/src/thingdef/thingdef_expression.cpp
index 19c02837c..53da5d42c 100644
--- a/src/thingdef/thingdef_expression.cpp
+++ b/src/thingdef/thingdef_expression.cpp
@@ -143,11 +143,13 @@ FxExpression *FxExpression::Resolve(FCompileContext &ctx)
 
 FxExpression *FxExpression::ResolveAsBoolean(FCompileContext &ctx)
 {
+	///FIXME: Use an actual boolean type
 	FxExpression *x = Resolve(ctx);
 	if (x != NULL)
 	{
 		switch (x->ValueType.Type)
 		{
+		case VAL_Int:
 		case VAL_Sound:
 		case VAL_Color:
 		case VAL_Name:
@@ -155,6 +157,9 @@ FxExpression *FxExpression::ResolveAsBoolean(FCompileContext &ctx)
 			break;
 
 		default:
+			ScriptPosition.Message(MSG_ERROR, "Not an integral type");
+			delete this;
+			return NULL;
 			break;
 		}
 	}
@@ -2140,7 +2145,6 @@ FxExpression *FxRandomPick::Resolve(FCompileContext &ctx)
 
 ExpEmit FxRandomPick::Emit(VMFunctionBuilder *build)
 {
-#pragma message("FxRandomPick::Emit: Floating point part needs reviewing!")
 	unsigned i;
 
 	assert(choices.Size() > 0);
@@ -2166,6 +2170,14 @@ ExpEmit FxRandomPick::Emit(VMFunctionBuilder *build)
 	// automatically pick it as the destination register for each case.
 	resultreg.Free(build);
 
+	// For floating point results, we need to get a new register, since we can't
+	// reuse the integer one used to store the random result.
+	if (ValueType == VAL_Float)
+	{
+		resultreg = ExpEmit(build, REGT_FLOAT);
+		resultreg.Free(build);
+	}
+
 	// Allocate space for the jump table.
 	size_t jumptable = build->Emit(OP_JMP, 0);
 	for (i = 1; i < choices.Size(); ++i)
@@ -2188,8 +2200,7 @@ ExpEmit FxRandomPick::Emit(VMFunctionBuilder *build)
 			else
 			{
 				double val = static_cast<FxConstant *>(choices[i])->GetValue().GetFloat();
-				build->Emit(OP_PARAM, 0, REGT_FLOAT | REGT_KONST, build->GetConstantFloat(val));
-				build->ParamChange(-1);	// all params should use the same register here.
+				build->Emit(OP_LKF, resultreg.RegNum, build->GetConstantFloat(val));
 			}
 		}
 		else
@@ -2200,14 +2211,7 @@ ExpEmit FxRandomPick::Emit(VMFunctionBuilder *build)
 			  // was expected. Copy it to the one we wanted.
 
 				resultreg.Reuse(build);	// This is really just for the assert in Reuse()
-				if (ValueType == VAL_Int)
-				{
-					build->Emit(OP_MOVE, resultreg.RegNum, casereg.RegNum, 0);
-				}
-				else
-				{
-					build->Emit(OP_MOVEF, resultreg.RegNum, casereg.RegNum, 0);
-				}
+				build->Emit(ValueType == VAL_Int ? OP_MOVE : OP_MOVEF, resultreg.RegNum, casereg.RegNum, 0);
 				resultreg.Free(build);
 			}
 			// Free this register so the remaining cases can use it.
diff --git a/src/timidity/mix.cpp b/src/timidity/mix.cpp
index beda91e16..05a3eddd4 100644
--- a/src/timidity/mix.cpp
+++ b/src/timidity/mix.cpp
@@ -190,7 +190,7 @@ void SF2Envelope::Release(Voice *v)
 	if (stage == SF2_ATTACK)
 	{
 		// The attack stage does not use an attenuation in cB like all the rest.
-		volume = log10(volume) * -200;
+		volume = float(log10(volume) * -200);
 	}
 	stage = SF2_RELEASE;
 	bUpdating = true;
diff --git a/src/timidity/playmidi.cpp b/src/timidity/playmidi.cpp
index 7d8294384..8acdd3487 100644
--- a/src/timidity/playmidi.cpp
+++ b/src/timidity/playmidi.cpp
@@ -94,7 +94,7 @@ void Renderer::recompute_freq(int v)
 		if (ch->pitchfactor == 0)
 		{
 			/* Damn. Somebody bent the pitch. */
-			ch->pitchfactor = pow(2.f, ((abs(pb) * ch->pitchsens) / (8191.f * 1200.f)));
+			ch->pitchfactor = float(pow(2.f, ((abs(pb) * ch->pitchsens) / (8191.f * 1200.f))));
 		}
 		if (pb < 0)
 		{
diff --git a/src/win32/fb_d3d9.cpp b/src/win32/fb_d3d9.cpp
index 4e3a14c18..d0ed84442 100644
--- a/src/win32/fb_d3d9.cpp
+++ b/src/win32/fb_d3d9.cpp
@@ -1487,10 +1487,10 @@ void D3DFB::DoOffByOneCheck ()
 	float texbot = 1.f / float(FBHeight);
 	FBVERTEX verts[4] =
 	{
-		{ -0.5f,  -0.5f, 0.5f, 1.f, 0, ~0,      0.f,    0.f },
-		{ 255.5f, -0.5f, 0.5f, 1.f, 0, ~0, texright,    0.f },
-		{ 255.5f,  0.5f, 0.5f, 1.f, 0, ~0, texright, texbot },
-		{ -0.5f,   0.5f, 0.5f, 1.f, 0, ~0,      0.f, texbot }
+		{ -0.5f,  -0.5f, 0.5f, 1.f, D3DCOLOR_RGBA(0,0,0,0), D3DCOLOR_RGBA(255,255,255,255),      0.f,    0.f },
+		{ 255.5f, -0.5f, 0.5f, 1.f, D3DCOLOR_RGBA(0,0,0,0), D3DCOLOR_RGBA(255,255,255,255), texright,    0.f },
+		{ 255.5f,  0.5f, 0.5f, 1.f, D3DCOLOR_RGBA(0,0,0,0), D3DCOLOR_RGBA(255,255,255,255), texright, texbot },
+		{ -0.5f,   0.5f, 0.5f, 1.f, D3DCOLOR_RGBA(0,0,0,0), D3DCOLOR_RGBA(255,255,255,255),      0.f, texbot }
 	};
 	int i, c;
 
diff --git a/src/win32/i_system.cpp b/src/win32/i_system.cpp
index 133337af5..a5c2eb84e 100644
--- a/src/win32/i_system.cpp
+++ b/src/win32/i_system.cpp
@@ -1423,11 +1423,11 @@ static HCURSOR CreateBitmapCursor(int xhot, int yhot, HBITMAP and_mask, HBITMAP
 {
 	ICONINFO iconinfo =
 	{
-		FALSE,		// fIcon
-		xhot,		// xHotspot
-		yhot,		// yHotspot
-		and_mask,	// hbmMask
-		color_mask	// hbmColor
+		FALSE,			// fIcon
+		(DWORD)xhot,	// xHotspot
+		(DWORD)yhot,	// yHotspot
+		and_mask,		// hbmMask
+		color_mask		// hbmColor
 	};
 	HCURSOR cursor = CreateIconIndirect(&iconinfo);