diff --git a/src/d_dehacked.cpp b/src/d_dehacked.cpp
index 225f24cab9..e5fd308b5d 100644
--- a/src/d_dehacked.cpp
+++ b/src/d_dehacked.cpp
@@ -2880,6 +2880,8 @@ void FinishDehPatch ()
 	// Now that all Dehacked patches have been processed, it's okay to free StateMap.
 	StateMap.Clear();
 	StateMap.ShrinkToFit();
+	TouchedActors.Clear();
+	TouchedActors.ShrinkToFit();
 }
 
 void ModifyDropAmount(AInventory *inv, int dropamount);
diff --git a/src/d_main.cpp b/src/d_main.cpp
index 2eaabf76d2..2b3e273a9a 100644
--- a/src/d_main.cpp
+++ b/src/d_main.cpp
@@ -122,6 +122,7 @@ extern void M_SetDefaultMode ();
 extern void R_ExecuteSetViewSize ();
 extern void G_NewInit ();
 extern void SetupPlayerClasses ();
+extern void HUD_InitHud();
 const FIWADInfo *D_FindIWAD(TArray<FString> &wadfiles, const char *iwad, const char *basewad);
 
 // PUBLIC FUNCTION PROTOTYPES ----------------------------------------------
@@ -2134,7 +2135,6 @@ void D_DoomMain (void)
 	R_Init ();
 
 	Printf ("DecalLibrary: Load decals.\n");
-	DecalLibrary.Clear ();
 	DecalLibrary.ReadAllDecals ();
 
 	// [RH] Add any .deh and .bex files on the command line.
@@ -2187,6 +2187,7 @@ void D_DoomMain (void)
 
 	//SBarInfo support.
 	SBarInfo::Load();
+	HUD_InitHud();
 
 	// [RH] User-configurable startup strings. Because BOOM does.
 	static const char *startupString[5] = {
diff --git a/src/g_shared/sbar.h b/src/g_shared/sbar.h
index b2f6173bf2..71dc66672b 100644
--- a/src/g_shared/sbar.h
+++ b/src/g_shared/sbar.h
@@ -383,6 +383,7 @@ DBaseStatusBar *CreateCustomStatusBar(int script=0);
 
 void ST_FormatMapName(FString &mapname, const char *mapnamecolor = "");
 void ST_LoadCrosshair(bool alwaysload=false);
+void ST_Clear();
 extern FTexture *CrosshairImage;
 
 #endif /* __SBAR_H__ */
diff --git a/src/g_shared/sbarinfo.cpp b/src/g_shared/sbarinfo.cpp
index ee29a3b5d2..a552a3ad1d 100644
--- a/src/g_shared/sbarinfo.cpp
+++ b/src/g_shared/sbarinfo.cpp
@@ -423,6 +423,8 @@ static void FreeSBarInfoScript()
 
 void SBarInfo::Load()
 {
+	FreeSBarInfoScript();
+	MugShotStates.Clear();
 	if(gameinfo.statusbar.IsNotEmpty())
 	{
 		int lump = Wads.CheckNumForFullName(gameinfo.statusbar, true);
diff --git a/src/g_shared/shared_hud.cpp b/src/g_shared/shared_hud.cpp
index d766d89024..9901c79409 100644
--- a/src/g_shared/shared_hud.cpp
+++ b/src/g_shared/shared_hud.cpp
@@ -769,14 +769,11 @@ static void DrawCoordinates(player_t * CPlayer)
 // draw the overlay
 //
 //---------------------------------------------------------------------------
-void HUD_InitHud();
 
 void DrawHUD()
 {
 	player_t * CPlayer = StatusBar->CPlayer;
 
-	if (HudFont==NULL) HUD_InitHud();
-
 	players[consoleplayer].inventorytics = 0;
 	if (hud_althudscale && SCREENWIDTH>640) 
 	{
diff --git a/src/g_shared/shared_sbar.cpp b/src/g_shared/shared_sbar.cpp
index 75084ae38e..09fb9417b8 100644
--- a/src/g_shared/shared_sbar.cpp
+++ b/src/g_shared/shared_sbar.cpp
@@ -197,6 +197,23 @@ void ST_LoadCrosshair(bool alwaysload)
 	CrosshairImage = TexMan[TexMan.CheckForTexture(name, FTexture::TEX_MiscPatch)];
 }
 
+//---------------------------------------------------------------------------
+//
+// ST_Clear
+//
+//---------------------------------------------------------------------------
+
+void ST_Clear()
+{
+	if (StatusBar != NULL)
+	{
+		StatusBar->Destroy();
+		StatusBar = NULL;
+	}
+	CrosshairImage = NULL;
+	CrosshairNum = 0;
+}
+
 //---------------------------------------------------------------------------
 //
 // Constructor
diff --git a/src/keysections.cpp b/src/keysections.cpp
index bfec4060e3..8d23c95820 100644
--- a/src/keysections.cpp
+++ b/src/keysections.cpp
@@ -44,6 +44,7 @@
 #include "w_wad.h"
 
 TArray<FKeySection> KeySections;
+extern TArray<FString> KeyConfWeapons;
 
 static void LoadKeys (const char *modname, bool dbl)
 {
@@ -159,6 +160,7 @@ void D_LoadWadSettings ()
 
 	ParsingKeyConf = true;
 	KeySections.Clear();
+	KeyConfWeapons.Clear();
 
 	while ((lump = Wads.FindLump ("KEYCONF", &lastlump)) != -1)
 	{
diff --git a/src/menu/loadsavemenu.cpp b/src/menu/loadsavemenu.cpp
index 97bda8494e..bdc5c3c307 100644
--- a/src/menu/loadsavemenu.cpp
+++ b/src/menu/loadsavemenu.cpp
@@ -53,9 +53,10 @@
 class DLoadSaveMenu : public DListMenu
 {
 	DECLARE_CLASS(DLoadSaveMenu, DListMenu)
+	friend void ClearSaveGames();
 
 protected:
-	static TDeletingArray<FSaveGameNode*> SaveGames;
+	static TArray<FSaveGameNode*> SaveGames;
 	static int LastSaved;
 	static int LastAccessed;
 
@@ -114,7 +115,7 @@ public:
 
 IMPLEMENT_CLASS(DLoadSaveMenu)
 
-TDeletingArray<FSaveGameNode*> DLoadSaveMenu::SaveGames;
+TArray<FSaveGameNode*> DLoadSaveMenu::SaveGames;
 int DLoadSaveMenu::LastSaved = -1;
 int DLoadSaveMenu::LastAccessed = -1;
 
@@ -126,6 +127,21 @@ FSaveGameNode *quickSaveSlot;
 //
 //=============================================================================
 
+void ClearSaveGames()
+{
+	for(unsigned i=0;i<DLoadSaveMenu::SaveGames.Size(); i++)
+	{
+		delete DLoadSaveMenu::SaveGames[i];
+	}
+	DLoadSaveMenu::SaveGames.Clear();
+}
+
+//=============================================================================
+//
+// Save data maintenance (stored statically)
+//
+//=============================================================================
+
 int DLoadSaveMenu::RemoveSaveSlot (int index)
 {
 	FSaveGameNode *file = SaveGames[index];
@@ -194,6 +210,8 @@ void DLoadSaveMenu::ReadSaveStrings ()
 		findstate_t c_file;
 		FString filter;
 
+		LastSaved = LastAccessed = -1;
+		quickSaveSlot = NULL;
 		filter = G_BuildSaveName ("*.zds", -1);
 		filefirst = I_FindFirst (filter.GetChars(), &c_file);
 		if (filefirst != ((void *)(-1)))
diff --git a/src/menu/menu.h b/src/menu/menu.h
index e8632a0b2a..dc333b42cb 100644
--- a/src/menu/menu.h
+++ b/src/menu/menu.h
@@ -111,6 +111,22 @@ struct FListMenuDescriptor : public FMenuDescriptor
 	const PClass *mClass;
 	FMenuDescriptor *mRedirect;	// used to redirect overlong skill and episode menus to option menu based alternatives
 	bool mCenter;
+
+	void Reset()
+	{
+		// Reset the default settings (ignore all other values in the struct)
+		mSelectOfsX = 0;
+		mSelectOfsY = 0;
+		mSelector.SetInvalid();
+		mDisplayTop = 0;
+		mXpos = 0;
+		mYpos = 0;
+		mLinespacing = 0;
+		mNetgameMessage = "";
+		mFont = NULL;
+		mFontColor = CR_UNTRANSLATED;
+		mFontColor2 = CR_UNTRANSLATED;
+	}
 };
 
 struct FOptionMenuSettings
@@ -141,6 +157,14 @@ struct FOptionMenuDescriptor : public FMenuDescriptor
 
 	void CalcIndent();
 	FOptionMenuItem *GetItem(FName name);
+	void Reset()
+	{
+		// Reset the default settings (ignore all other values in the struct)
+		mPosition = 0;
+		mScrollTop = 0;
+		mIndent = 0;
+		mDontDim = 0;
+	}
 
 };
 						
diff --git a/src/menu/menudef.cpp b/src/menu/menudef.cpp
index 79ae99a237..2a8da7d880 100644
--- a/src/menu/menudef.cpp
+++ b/src/menu/menudef.cpp
@@ -52,6 +52,8 @@
 
 #include "optionmenuitems.h"
 
+void ClearSaveGames();
+
 MenuDescriptorList MenuDescriptors;
 static FListMenuDescriptor DefaultListMenuSettings;	// contains common settings for all list menus
 static FOptionMenuDescriptor DefaultOptionMenuSettings;	// contains common settings for all Option menus
@@ -84,6 +86,8 @@ static void DeinitMenus()
 		}
 	}
 	DMenu::CurrentMenu = NULL;
+	DefaultListMenuSettings.mItems.Clear();
+	ClearSaveGames();
 }
 
 //=============================================================================
@@ -825,8 +829,11 @@ void M_ParseMenuDefs()
 	OptionSettings.mFontColorHeader = V_FindFontColor(gameinfo.mFontColorHeader);
 	OptionSettings.mFontColorHighlight = V_FindFontColor(gameinfo.mFontColorHighlight);
 	OptionSettings.mFontColorSelection = V_FindFontColor(gameinfo.mFontColorSelection);
+	DefaultListMenuSettings.Reset();
+	DefaultOptionMenuSettings.Reset();
 
 	atterm(	DeinitMenus);
+	DeinitMenus();
 	while ((lump = Wads.FindLump ("MENUDEF", &lastlump)) != -1)
 	{
 		FScanner sc(lump);
@@ -841,6 +848,10 @@ void M_ParseMenuDefs()
 			else if (sc.Compare("DEFAULTLISTMENU"))
 			{
 				ParseListMenuBody(sc, &DefaultListMenuSettings);
+				if (DefaultListMenuSettings.mItems.Size() > 0)
+				{
+					I_FatalError("You cannot add menu items to the menu default settings.");
+				}
 			}
 			else if (sc.Compare("OPTIONVALUE"))
 			{
@@ -861,6 +872,10 @@ void M_ParseMenuDefs()
 			else if (sc.Compare("DEFAULTOPTIONMENU"))
 			{
 				ParseOptionMenuBody(sc, &DefaultOptionMenuSettings);
+				if (DefaultOptionMenuSettings.mItems.Size() > 0)
+				{
+					I_FatalError("You cannot add menu items to the menu default settings.");
+				}
 			}
 			else
 			{
diff --git a/src/p_setup.cpp b/src/p_setup.cpp
index b2e3852862..fa30df88fc 100644
--- a/src/p_setup.cpp
+++ b/src/p_setup.cpp
@@ -4074,11 +4074,7 @@ static void P_Shutdown ()
 	P_DeinitKeyMessages ();
 	P_FreeLevelData ();
 	P_FreeExtraLevelData ();
-	if (StatusBar != NULL)
-	{
-		StatusBar->Destroy();
-		StatusBar = NULL;
-	}
+	ST_Clear();
 }
 
 #if 0
diff --git a/src/p_user.cpp b/src/p_user.cpp
index a9c04ad499..831d65dd5c 100644
--- a/src/p_user.cpp
+++ b/src/p_user.cpp
@@ -133,6 +133,7 @@ void SetupPlayerClasses ()
 {
 	FPlayerClass newclass;
 
+	PlayerClasses.Clear();
 	for (unsigned i=0; i<gameinfo.PlayerClasses.Size(); i++)
 	{
 		newclass.Flags = 0;
diff --git a/src/r_data.cpp b/src/r_data.cpp
index 37602007e1..a298cc03ff 100644
--- a/src/r_data.cpp
+++ b/src/r_data.cpp
@@ -127,6 +127,22 @@ void R_SetDefaultColormap (const char *name)
 	}
 }
 
+//==========================================================================
+//
+// R_DeinitColormaps
+//
+//==========================================================================
+
+void R_DeinitColormaps ()
+{
+	fakecmaps.Clear();
+	if (realcolormaps != NULL)
+	{
+		delete[] realcolormaps;
+		realcolormaps = NULL;
+	}
+}
+
 //==========================================================================
 //
 // R_InitColormaps
@@ -141,6 +157,8 @@ void R_InitColormaps ()
 
 	FakeCmap cm;
 
+	R_DeinitColormaps();
+
 	cm.name[0] = 0;
 	cm.blend = 0;
 	fakecmaps.Push(cm);
@@ -215,21 +233,6 @@ void R_InitColormaps ()
 	numfakecmaps = fakecmaps.Size();
 }
 
-//==========================================================================
-//
-// R_DeinitColormaps
-//
-//==========================================================================
-
-void R_DeinitColormaps ()
-{
-	if (realcolormaps != NULL)
-	{
-		delete[] realcolormaps;
-		realcolormaps = NULL;
-	}
-}
-
 //==========================================================================
 //
 // [RH] Returns an index into realcolormaps. Multiply it by
diff --git a/src/r_things.cpp b/src/r_things.cpp
index 6fa357434c..be25d31539 100644
--- a/src/r_things.cpp
+++ b/src/r_things.cpp
@@ -866,7 +866,10 @@ void R_InitSprites ()
 		numskins++;
 	}
 
+	SpriteFrames.Clear();
+
 	// [RH] Do some preliminary setup
+	if (skins != NULL) delete [] skins;
 	skins = new FPlayerSkin[numskins];
 	memset (skins, 0, sizeof(*skins) * numskins);
 	for (i = 0; i < numskins; i++)
diff --git a/src/r_translate.cpp b/src/r_translate.cpp
index eef8c1c1bf..d7e42384e6 100644
--- a/src/r_translate.cpp
+++ b/src/r_translate.cpp
@@ -869,7 +869,9 @@ void R_DeinitTranslationTables()
 				translationtables[i][j] = NULL;
 			}
 		}
+		translationtables[i].Clear();
 	}
+	BloodTranslationColors.Clear();
 }
 
 //----------------------------------------------------------------------------
diff --git a/src/s_environment.cpp b/src/s_environment.cpp
index d59d1c0430..001b3d4ed4 100644
--- a/src/s_environment.cpp
+++ b/src/s_environment.cpp
@@ -587,6 +587,7 @@ void S_ParseReverbDef ()
 	int lump, lastlump = 0;
 
 	atterm (S_UnloadReverbDef);
+	S_UnloadReverbDef ();
 
 	while ((lump = Wads.FindLump ("REVERBS", &lastlump)) != -1)
 	{
@@ -597,15 +598,21 @@ void S_ParseReverbDef ()
 void S_UnloadReverbDef ()
 {
 	ReverbContainer *probe = Environments;
+	ReverbContainer **pNext = NULL;
 
 	while (probe != NULL)
 	{
 		ReverbContainer *next = probe->Next;
 		if (!probe->Builtin)
 		{
+			if (pNext != NULL) *pNext = probe->Next;
 			delete[] const_cast<char *>(probe->Name);
 			delete probe;
 		}
+		else
+		{
+			pNext = &probe->Next;
+		}
 		probe = next;
 	}
 	Environments = &Off;
diff --git a/src/s_sound.cpp b/src/s_sound.cpp
index c09e913be8..4c4053899b 100644
--- a/src/s_sound.cpp
+++ b/src/s_sound.cpp
@@ -292,6 +292,7 @@ void S_Init ()
 	if (S_SoundCurve != NULL)
 	{
 		delete[] S_SoundCurve;
+		S_SoundCurve = NULL;
 	}
 
 	// Heretic and Hexen have sound curve lookup tables. Doom does not.
diff --git a/src/statistics.cpp b/src/statistics.cpp
index 9c07ac6da1..fe72f76670 100644
--- a/src/statistics.cpp
+++ b/src/statistics.cpp
@@ -130,11 +130,11 @@ extern TArray<level_info_t> wadlevelinfos;
 
 static void ParseStatistics(const char *fn, TArray<FStatistics> &statlist)
 {
+	statlist.Clear();
 	try
 	{
 		FScanner sc;
 		sc.OpenFile(fn);
-		statlist.Clear();
 
 		while (sc.GetString())
 		{
diff --git a/src/thingdef/thingdef.cpp b/src/thingdef/thingdef.cpp
index 1b2f844bd9..0d9dfad30c 100644
--- a/src/thingdef/thingdef.cpp
+++ b/src/thingdef/thingdef.cpp
@@ -337,6 +337,8 @@ void LoadActors ()
 {
 	int lastlump, lump;
 
+	StateParams.Clear();
+	GlobalSymbols.ReleaseSymbols();
 	DropItemList.Clear();
 	FScriptPosition::ResetErrorCounter();
 	InitThingdef();
diff --git a/src/thingdef/thingdef.h b/src/thingdef/thingdef.h
index 6b2124149d..41925b7120 100644
--- a/src/thingdef/thingdef.h
+++ b/src/thingdef/thingdef.h
@@ -123,7 +123,8 @@ class FStateExpressions
 	TArray<FStateExpression> expressions;
 
 public:
-	~FStateExpressions();
+	~FStateExpressions() { Clear(); }
+	void Clear();
 	int Add(FxExpression *x, const PClass *o, bool c);
 	int Reserve(int num, const PClass *cls);
 	void Set(int num, FxExpression *x, bool cloned = false);
diff --git a/src/thingdef/thingdef_expression.cpp b/src/thingdef/thingdef_expression.cpp
index 1315d70ee6..5f7238e296 100644
--- a/src/thingdef/thingdef_expression.cpp
+++ b/src/thingdef/thingdef_expression.cpp
@@ -2765,7 +2765,7 @@ FStateExpressions StateParams;
 //
 //==========================================================================
 
-FStateExpressions::~FStateExpressions()
+void FStateExpressions::Clear()
 {
 	for(unsigned i=0; i<Size(); i++)
 	{
@@ -2774,6 +2774,7 @@ FStateExpressions::~FStateExpressions()
 			delete expressions[i].expr;
 		}
 	}
+	expressions.Clear();
 }
 
 //==========================================================================
diff --git a/src/v_font.cpp b/src/v_font.cpp
index 9acd2d4c22..9a2e6c8f03 100644
--- a/src/v_font.cpp
+++ b/src/v_font.cpp
@@ -2050,6 +2050,11 @@ void V_InitFontColors ()
 
 	info.Index = -1;
 
+	TranslationParms[0].Clear();
+	TranslationParms[1].Clear();
+	TranslationLookup.Clear();
+	TranslationColors.Clear();
+
 	while ((lump = Wads.FindLump ("TEXTCOLO", &lastlump)) != -1)
 	{
 		if (gameinfo.flags & GI_NOTEXTCOLOR)
@@ -2435,3 +2440,13 @@ void V_InitFonts()
 		}
 	}
 }
+
+void V_ClearFonts()
+{
+	while (FFont::FirstFont != NULL)
+	{
+		delete FFont::FirstFont;
+	}
+	FFont::FirstFont = NULL;
+	SmallFont = SmallFont2 = BigFont = ConFont = IntermissionFont = NULL;
+}
\ No newline at end of file
diff --git a/src/v_font.h b/src/v_font.h
index 5499c58afd..27cf50b2cb 100644
--- a/src/v_font.h
+++ b/src/v_font.h
@@ -128,7 +128,7 @@ protected:
 	static FFont *FirstFont;
 	friend struct FontsDeleter;
 
-	friend void V_Shutdown();
+	friend void V_ClearFonts();
 
 	friend FArchive &SerializeFFontPtr (FArchive &arc, FFont* &font);
 };
@@ -137,6 +137,7 @@ protected:
 extern FFont *SmallFont, *SmallFont2, *BigFont, *ConFont, *IntermissionFont;
 
 void V_InitFonts();
+void V_ClearFonts();
 EColorRange V_FindFontColor (FName name);
 PalEntry V_LogColorFromColorRange (EColorRange range);
 EColorRange V_ParseFontColor (const BYTE *&color_value, int normalcolor, int boldcolor);
diff --git a/src/v_video.cpp b/src/v_video.cpp
index 6beb89292d..ae09f9b783 100644
--- a/src/v_video.cpp
+++ b/src/v_video.cpp
@@ -1692,10 +1692,7 @@ void V_Shutdown()
 		s->ObjectFlags |= OF_YesReallyDelete;
 		delete s;
 	}
-	while (FFont::FirstFont != NULL)
-	{
-		delete FFont::FirstFont;
-	}
+	V_ClearFonts();
 }
 
 EXTERN_CVAR (Bool, vid_tft)
diff --git a/src/xlat/parse_xlat.cpp b/src/xlat/parse_xlat.cpp
index 6221c54975..5edcde581c 100644
--- a/src/xlat/parse_xlat.cpp
+++ b/src/xlat/parse_xlat.cpp
@@ -156,16 +156,23 @@ struct XlatParseContext : public FParseContext
 //
 //==========================================================================
 
+void P_ClearTranslator()
+{
+	SimpleLineTranslations.Clear();
+	NumBoomish = 0;
+	SectorTranslations.Clear();
+	SectorMasks.Clear();
+	memset(LineFlagTranslations, 0, sizeof(LineFlagTranslations));
+	LastTranslator = "";
+}
+
 void P_LoadTranslator(const char *lumpname)
 {
 	// Only read the lump if it differs from the previous one.
 	if (LastTranslator.CompareNoCase(lumpname))
 	{
 		// Clear the old data before parsing the lump.
-		SimpleLineTranslations.Clear();
-		NumBoomish = 0;
-		SectorTranslations.Clear();
-		SectorMasks.Clear();
+		P_ClearTranslator();
 
 		void *pParser = XlatParseAlloc(malloc);
 
@@ -179,3 +186,5 @@ void P_LoadTranslator(const char *lumpname)
 		LastTranslator = lumpname;
 	}
 }
+
+