diff --git a/src/d_iwad.cpp b/src/d_iwad.cpp
index b02407b157..0c7cc3bf24 100644
--- a/src/d_iwad.cpp
+++ b/src/d_iwad.cpp
@@ -549,6 +549,7 @@ int FIWadManager::IdentifyVersion (TArray<FString> &wadfiles, const char *iwad,
 		exit (0);
 
 	// zdoom.pk3 must always be the first file loaded and the IWAD second.
+	wadfiles.Clear();
 	D_AddFile (wadfiles, zdoom_wad);
 
 	if (mIWads[wads[pickwad].Type].preload >= 0)
diff --git a/src/decallib.cpp b/src/decallib.cpp
index bfcc1ac147..072262da9c 100644
--- a/src/decallib.cpp
+++ b/src/decallib.cpp
@@ -347,6 +347,15 @@ void FDecalLib::ReadAllDecals ()
 	int lump, lastlump = 0;
 	unsigned int i;
 
+	for(unsigned i=0;i<Animators.Size(); i++)
+	{
+		delete Animators[i];
+	}
+	Animators.Clear();
+	FDecalCombinerAnim::AnimatorList.Clear();
+
+	DecalLibrary.Clear();
+
 	while ((lump = Wads.FindLump ("DECALDEF", &lastlump)) != -1)
 	{
 		FScanner sc(lump);
diff --git a/src/g_game.cpp b/src/g_game.cpp
index 19acf8c571..e10936f93b 100644
--- a/src/g_game.cpp
+++ b/src/g_game.cpp
@@ -180,8 +180,6 @@ wbstartstruct_t wminfo; 				// parms for world map / intermission
  
 short			consistancy[MAXPLAYERS][BACKUPTICS];
  
-BYTE*			savebuffer;
- 
  
 #define MAXPLMOVE				(forwardmove[1]) 
  
diff --git a/src/g_game.h b/src/g_game.h
index 20fdae8923..a9f5f0afba 100644
--- a/src/g_game.h
+++ b/src/g_game.h
@@ -85,6 +85,8 @@ void G_AddViewAngle (int yaw);
 class AActor;
 extern AActor *bodyque[BODYQUESIZE]; 
 extern int bodyqueslot; 
+class AInventory;
+extern const AInventory *SendItemUse, *SendItemDrop;
 
 
 #endif
diff --git a/src/g_hub.cpp b/src/g_hub.cpp
index 162aacd164..22c6ff6f93 100644
--- a/src/g_hub.cpp
+++ b/src/g_hub.cpp
@@ -76,7 +76,7 @@ struct FHubInfo
 };
 
 
-TArray<FHubInfo> hubdata;
+static TArray<FHubInfo> hubdata;
 
 void G_LeavingHub(int mode, cluster_info_t * cluster, wbstartstruct_t * wbs)
 {
@@ -182,3 +182,8 @@ void G_ReadHubInfo (PNGHandle *png)
 		G_SerializeHub(arc);
 	}
 }
+
+void G_ClearHubInfo()
+{
+	hubdata.Clear();
+}
\ No newline at end of file
diff --git a/src/g_level.cpp b/src/g_level.cpp
index e3321f8840..a962d51961 100644
--- a/src/g_level.cpp
+++ b/src/g_level.cpp
@@ -119,7 +119,6 @@ bool savegamerestore;
 
 extern int mousex, mousey;
 extern bool sendpause, sendsave, sendturn180, SendLand;
-extern const AInventory *SendItemUse, *SendItemDrop;
 
 void *statcopy;					// for statistics driver
 
@@ -309,6 +308,7 @@ void G_InitNew (const char *mapname, bool bTitleLevel)
 	bool wantFast;
 	int i;
 
+	G_ClearHubInfo();
 	if (!savegamerestore)
 	{
 		G_ClearSnapshots ();
diff --git a/src/g_level.h b/src/g_level.h
index d7add35b50..6cb9d84417 100644
--- a/src/g_level.h
+++ b/src/g_level.h
@@ -514,6 +514,7 @@ void G_UnSnapshotLevel (bool keepPlayers);
 struct PNGHandle;
 void G_ReadSnapshots (PNGHandle *png);
 void G_WriteSnapshots (FILE *file);
+void G_ClearHubInfo();
 
 enum ESkillProperty
 {
diff --git a/src/g_mapinfo.cpp b/src/g_mapinfo.cpp
index adf0b2cd03..bc1a19d48d 100644
--- a/src/g_mapinfo.cpp
+++ b/src/g_mapinfo.cpp
@@ -1803,7 +1803,11 @@ void DeinitIntermissions();
 
 static void ClearMapinfo()
 {
+	wadclusterinfos.Clear();
+	wadlevelinfos.Clear();
 	ClearEpisodes();
+	AllSkills.Clear();
+	DefaultSkill = -1;
 	DeinitIntermissions();
 }
 
@@ -1820,6 +1824,7 @@ void G_ParseMapInfo (const char *basemapinfo)
 	int lump, lastlump = 0;
 	level_info_t gamedefaults;
 
+	ClearMapinfo();
 	atterm(ClearMapinfo);
 
 	// Parse the default MAPINFO for the current game. This lump *MUST* come from zdoom.pk3.
diff --git a/src/g_shared/a_pickups.cpp b/src/g_shared/a_pickups.cpp
index 524daee77b..f059d8d3a1 100644
--- a/src/g_shared/a_pickups.cpp
+++ b/src/g_shared/a_pickups.cpp
@@ -16,6 +16,7 @@
 #include "a_specialspot.h"
 #include "thingdef/thingdef.h"
 #include "g_level.h"
+#include "g_game.h"
 #include "doomstat.h"
 
 static FRandom pr_restore ("RestorePos");
@@ -1033,6 +1034,10 @@ void AInventory::Destroy ()
 	}
 	Inventory = NULL;
 	Super::Destroy ();
+
+	// Although contrived it can theoretically happen that these variables still got a pointer to this item
+	if (SendItemUse == this) SendItemUse = NULL;
+	if (SendItemDrop == this) SendItemDrop = NULL;
 }
 
 //===========================================================================
diff --git a/src/info.cpp b/src/info.cpp
index 988c175dfe..f345a6e7f8 100644
--- a/src/info.cpp
+++ b/src/info.cpp
@@ -101,6 +101,7 @@ int GetSpriteIndex(const char * spritename)
 
 void FActorInfo::StaticInit ()
 {
+	sprites.Clear();
 	if (sprites.Size() == 0)
 	{
 		spritedef_t temp;