diff --git a/src/dos/drive_cache.cpp b/src/dos/drive_cache.cpp
index e0500d30..9bd548e6 100644
--- a/src/dos/drive_cache.cpp
+++ b/src/dos/drive_cache.cpp
@@ -243,7 +243,7 @@ void DOS_Drive_Cache::AddEntryDirOverlay(const char* path, bool checkExists) {
 #if defined (WIN32) 
 		//OS2 ?
 		if (post > dironly && *(post - 1) == ':' && (post - dironly) == 2) 
-			post++; //move away from X: as need to end up with x:\ 
+			post++; //move away from X: as need to end up with x:\ .  
 #else
 	//Lets hope this is not really used.. (root folder specified as overlay)
 		if (post == dironly)
diff --git a/src/dos/drive_overlay.cpp b/src/dos/drive_overlay.cpp
index 73f2f2d7..0da3d9e2 100644
--- a/src/dos/drive_overlay.cpp
+++ b/src/dos/drive_overlay.cpp
@@ -144,6 +144,10 @@ bool Overlay_Drive::MakeDir(char * dir) {
 #endif
 	/* Overlay: Create in Overlay only and add it to drive_cache + some entries else the drive_cache will try to access it. Needs an AddEntry for directories. */ 
 
+	//Check if leading dir is marked as deleted.
+	if (check_if_leading_is_deleted(dir)) return false;
+
+	//Check if directory itself is marked as deleted
 	if (is_deleted_path(dir) && localDrive::TestDir(dir)) {
 		//Was deleted before and exists (last one is safety check)
 		remove_deleted_path(dir,true);
@@ -453,10 +457,12 @@ bool Overlay_Drive::FileOpen(DOS_File * * file,char * name,Bit32u flags) {
 
 
 bool Overlay_Drive::FileCreate(DOS_File * * file,char * name,Bit16u /*attributes*/) {
-
 	//TODO Check if it exists in the dirCache ? // fix addentry ?  or just double check (ld and overlay)
 	//AddEntry looks sound to me.. 
 	
+	//check if leading part of filename is a deleted directory
+	if (check_if_leading_is_deleted(name)) return false;
+
 	FILE* f = create_file_in_overlay(name,"wb+");
 	if(!f) {
 		if (logoverlay) LOG_MSG("File creation in overlay system failed %s",name);
@@ -752,9 +758,8 @@ again:
 	char relativename[CROSS_LEN];
 	strcpy(relativename,srchInfo[id].srch_dir);
 	//strip off basedir: //TODO cleanup
-	char* prel = relativename+strlen(basedir);
 	strcpy(ovname,overlaydir);
-	prel =full_name+strlen(basedir);
+	char* prel = full_name + strlen(basedir);
 
 	
 
@@ -767,7 +772,7 @@ again:
 	}
 #endif
 
-	strcat(ovname,full_name+strlen(basedir));
+	strcat(ovname,prel);
 	bool statok = ( stat(ovname,&stat_block)==0);
 
 	if (logoverlay) LOG_MSG("listing %s",dir_entcopy);
@@ -940,8 +945,8 @@ void Overlay_Drive::add_special_file_to_disk(const char* dosname, const char* op
 	char buf[5] = {'e','m','p','t','y'};
 	fwrite(buf,5,1,f);
 	fclose(f);
-
 }
+
 void Overlay_Drive::remove_special_file_from_disk(const char* dosname, const char* operation) {
 	std::string name = create_filename_of_special_operation(dosname,operation);
 	char overlayname[CROSS_LEN];
@@ -952,15 +957,12 @@ void Overlay_Drive::remove_special_file_from_disk(const char* dosname, const cha
 }
 
 std::string Overlay_Drive::create_filename_of_special_operation(const char* dosname, const char* operation) {
-
 	std::string res(dosname);
 	std::string::size_type s = res.rfind("\\"); //CHECK DOS or host endings.... on update_cache
 	if (s == std::string::npos) s = 0; else s++;
 	std::string oper = special_prefix +"_" +operation +"_";
 	res.insert(s,oper);
 	return res;
-
-
 }
 
 
@@ -1029,7 +1031,7 @@ bool Overlay_Drive::is_deleted_path(const char* name) {
 		if (namelen < blockedlen) continue;
 		//See if input starts with name. 
 		std::string::size_type n = sname.find(*it);
-		if (n == 0 && (namelen == blockedlen) || *(name+blockedlen) =='\\' ) return true;
+		if (n == 0 && ((namelen == blockedlen) || *(name+blockedlen) =='\\' )) return true;
 	}
 	return false;
 }
@@ -1044,6 +1046,16 @@ void Overlay_Drive::remove_deleted_path(const char* name, bool create_on_disk) {
 		}
 	}
 }
+bool Overlay_Drive::check_if_leading_is_deleted(const char* name){
+	const char* dname = strrchr(name,'\\');
+	if (dname != NULL) {
+		char dirname[CROSS_LEN];
+		strncpy(dirname,name,dname - name);
+		dirname[dname - name] = 0;
+		if (is_deleted_path(dirname)) return true;
+	}
+	return false;
+}
 
 bool Overlay_Drive::FileExists(const char* name) {
 	char overlayname[CROSS_LEN];
diff --git a/src/dos/drives.h b/src/dos/drives.h
index 1bf665cd..2cb0654b 100644
--- a/src/dos/drives.h
+++ b/src/dos/drives.h
@@ -426,7 +426,6 @@ public:
 	virtual bool FileStat(const char* name, FileStat_Block * const stat_block);
 	virtual void EmptyCache(void);
 
-	bool Sync_leading_dirs(const char* dos_filename);
 	FILE* create_file_in_overlay(char* dos_filename, char const* mode);
 	virtual Bits UnMount(void);
 	virtual bool TestDir(char * dir);
@@ -435,6 +434,7 @@ public:
 private:
 	char overlaydir[CROSS_LEN];
 	bool optimize_cache_v1;
+	bool Sync_leading_dirs(const char* dos_filename);
 	void add_DOSname_to_cache(const char* name);
 	void remove_DOSname_from_cache(const char* name);
 	void add_DOSdir_to_cache(const char* name);
@@ -450,6 +450,7 @@ private:
 	void add_deleted_path(const char* name, bool create_on_disk);
 	void remove_deleted_path(const char* name, bool create_on_disk);
 	bool is_deleted_path(const char* name);
+	bool check_if_leading_is_deleted(const char* name);
 
 	bool is_dir_only_in_overlay(const char* name); //cached
 
diff --git a/src/gui/sdlmain.cpp b/src/gui/sdlmain.cpp
index dd0c64f9..6a1fdc00 100644
--- a/src/gui/sdlmain.cpp
+++ b/src/gui/sdlmain.cpp
@@ -752,16 +752,16 @@ dosurface:
 		sdl.opengl.displaylist = glGenLists(1);
 		glNewList(sdl.opengl.displaylist, GL_COMPILE);
 		glBindTexture(GL_TEXTURE_2D, sdl.opengl.texture);
-		glBegin(GL_QUADS);
-		// lower left
-		glTexCoord2f(0,tex_height); glVertex2f(-1.0f,-1.0f);
-		// lower right
-		glTexCoord2f(tex_width,tex_height); glVertex2f(1.0f, -1.0f);
-		// upper right
-		glTexCoord2f(tex_width,0); glVertex2f(1.0f, 1.0f);
+
+		glBegin(GL_TRIANGLES);
 		// upper left
 		glTexCoord2f(0,0); glVertex2f(-1.0f, 1.0f);
+		// lower left
+		glTexCoord2f(0,tex_height*2); glVertex2f(-1.0f,-3.0f);
+		// upper right
+		glTexCoord2f(tex_width*2,0); glVertex2f(3.0f, 1.0f);
 		glEnd();
+
 		glEndList();
 		sdl.desktop.type=SCREEN_OPENGL;
 		retFlags = GFX_CAN_32 | GFX_SCALING;
diff --git a/src/hardware/joystick.cpp b/src/hardware/joystick.cpp
index b6fe5c8c..f1dc22a1 100644
--- a/src/hardware/joystick.cpp
+++ b/src/hardware/joystick.cpp
@@ -67,7 +67,7 @@ struct JoyStick {
 	}
 
 	void transform_circular(){
-		float r = sqrt(xpos * xpos + ypos * ypos);
+		float r = sqrtf(xpos * xpos + ypos * ypos);
 		if (r == 0.0) {xfinal = xpos; yfinal = ypos; return;}
 		float deadzone_f = deadzone / 100.0f;
 		float s = 1.0f - deadzone_f;
@@ -77,8 +77,8 @@ struct JoyStick {
 		}
 
 		float deadzonescale = (r - deadzone_f) / s; //r if deadzone=0;
-		float xa = fabs(xpos);
-		float ya = fabs(ypos);
+		float xa = fabsf(xpos);
+		float ya = fabsf(ypos);
 		float maxpos = (ya>xa?ya:xa);
 		xfinal = xpos * deadzonescale/maxpos;
 		yfinal = ypos * deadzonescale/maxpos;
diff --git a/src/hardware/pcspeaker.cpp b/src/hardware/pcspeaker.cpp
index bde5ba02..9de948ef 100644
--- a/src/hardware/pcspeaker.cpp
+++ b/src/hardware/pcspeaker.cpp
@@ -278,7 +278,7 @@ static void PCSPEAKER_CallBack(Bitu len) {
 				index+=vol_len;
 			} else {
 				/* Check how long it will take to goto new level */
-				float vol_time=fabs(vol_diff)/SPKR_SPEED;
+				float vol_time=fabsf(vol_diff)/SPKR_SPEED;
 				if (vol_time<=vol_len) {
 					/* Volume reaches endpoint in this block, calc until that point */
 					value+=vol_time*spkr.volcur;