diff --git a/builtin/mainmenu/dlg_contentstore.lua b/builtin/mainmenu/dlg_contentstore.lua
index 880e3a157..cc7f74219 100644
--- a/builtin/mainmenu/dlg_contentstore.lua
+++ b/builtin/mainmenu/dlg_contentstore.lua
@@ -1177,8 +1177,12 @@ end
 
 function store.handle_events(event)
 	if event == "DialogShow" then
+		-- On mobile, don't show the "MINETEST" header behind the dialog.
+		mm_game_theme.set_engine(TOUCHSCREEN_GUI)
+
 		-- If the store is already loaded, auto-install packages here.
 		do_auto_install()
+
 		return true
 	end
 
diff --git a/builtin/mainmenu/dlg_reinstall_mtg.lua b/builtin/mainmenu/dlg_reinstall_mtg.lua
index 26af19708..87d494a90 100644
--- a/builtin/mainmenu/dlg_reinstall_mtg.lua
+++ b/builtin/mainmenu/dlg_reinstall_mtg.lua
@@ -41,8 +41,6 @@ function check_reinstall_mtg()
 		return
 	end
 
-	mm_game_theme.reset()
-
 	local maintab = ui.find_by_name("maintab")
 
 	local dlg = create_reinstall_mtg_dlg()
@@ -96,7 +94,10 @@ local function buttonhandler(this, fields)
 end
 
 local function eventhandler(event)
-	if event == "MenuQuit" then
+	if event == "DialogShow" then
+		mm_game_theme.set_engine()
+		return true
+	elseif event == "MenuQuit" then
 		-- Don't allow closing the dialog with ESC, but still allow exiting
 		-- Minetest.
 		core.close()
diff --git a/builtin/mainmenu/dlg_version_info.lua b/builtin/mainmenu/dlg_version_info.lua
index bb47142a0..98085ee4a 100644
--- a/builtin/mainmenu/dlg_version_info.lua
+++ b/builtin/mainmenu/dlg_version_info.lua
@@ -71,6 +71,15 @@ local function version_info_buttonhandler(this, fields)
 	return false
 end
 
+local function version_info_eventhandler(event)
+	if event == "DialogShow" then
+		mm_game_theme.set_engine()
+		return true
+	end
+
+	return false
+end
+
 local function create_version_info_dlg(new_version, url)
 	assert(type(new_version) == "string")
 	assert(type(url) == "string")
@@ -78,7 +87,7 @@ local function create_version_info_dlg(new_version, url)
 	local retval = dialog_create("version_info",
 		version_info_formspec,
 		version_info_buttonhandler,
-		nil)
+		version_info_eventhandler)
 
 	retval.data.new_version = new_version
 	retval.data.url = url
diff --git a/builtin/mainmenu/game_theme.lua b/builtin/mainmenu/game_theme.lua
index 89e1b66c8..993a48c1e 100644
--- a/builtin/mainmenu/game_theme.lua
+++ b/builtin/mainmenu/game_theme.lua
@@ -20,10 +20,6 @@ mm_game_theme = {}
 
 --------------------------------------------------------------------------------
 function mm_game_theme.init()
-	mm_game_theme.defaulttexturedir = core.get_texturepath_share() .. DIR_DELIM .. "base" ..
-						DIR_DELIM .. "pack" .. DIR_DELIM
-	mm_game_theme.basetexturedir = mm_game_theme.defaulttexturedir
-
 	mm_game_theme.texturepack = core.settings:get("texture_path")
 
 	mm_game_theme.gameid = nil
@@ -32,35 +28,27 @@ function mm_game_theme.init()
 end
 
 --------------------------------------------------------------------------------
-function mm_game_theme.update(tab,gamedetails)
-	if tab ~= "singleplayer" then
-		mm_game_theme.reset()
-		return
-	end
-
-	if gamedetails == nil then
-		return
-	end
-
-	mm_game_theme.update_game(gamedetails)
-end
-
---------------------------------------------------------------------------------
-function mm_game_theme.reset()
+function mm_game_theme.set_engine(hide_decorations)
 	mm_game_theme.gameid = nil
+	mm_game_theme.stop_music()
+
+	core.set_topleft_text("")
+
 	local have_bg      = false
-	local have_overlay = mm_game_theme.set_generic("overlay")
+	local have_overlay = mm_game_theme.set_engine_single("overlay")
 
 	if not have_overlay then
-		have_bg = mm_game_theme.set_generic("background")
+		have_bg = mm_game_theme.set_engine_single("background")
 	end
 
-	mm_game_theme.clear("header")
-	mm_game_theme.clear("footer")
+	mm_game_theme.clear_single("header")
+	mm_game_theme.clear_single("footer")
 	core.set_clouds(false)
 
-	mm_game_theme.set_generic("footer")
-	mm_game_theme.set_generic("header")
+	if not hide_decorations then
+		mm_game_theme.set_engine_single("header")
+		mm_game_theme.set_engine_single("footer")
+	end
 
 	if not have_bg then
 		if core.settings:get_bool("menu_clouds") then
@@ -69,51 +57,50 @@ function mm_game_theme.reset()
 			mm_game_theme.set_dirt_bg()
 		end
 	end
-
-	if mm_game_theme.music_handle ~= nil then
-		core.sound_stop(mm_game_theme.music_handle)
-	end
 end
 
 --------------------------------------------------------------------------------
-function mm_game_theme.update_game(gamedetails)
+function mm_game_theme.set_game(gamedetails)
+	assert(gamedetails ~= nil)
+
 	if mm_game_theme.gameid == gamedetails.id then
 		return
 	end
+	mm_game_theme.gameid = gamedetails.id
+	mm_game_theme.set_music(gamedetails)
+
+	core.set_topleft_text(gamedetails.name)
 
 	local have_bg      = false
-	local have_overlay = mm_game_theme.set_game("overlay",gamedetails)
+	local have_overlay = mm_game_theme.set_game_single("overlay", gamedetails)
 
 	if not have_overlay then
-		have_bg = mm_game_theme.set_game("background",gamedetails)
+		have_bg = mm_game_theme.set_game_single("background", gamedetails)
 	end
 
-	mm_game_theme.clear("header")
-	mm_game_theme.clear("footer")
+	mm_game_theme.clear_single("header")
+	mm_game_theme.clear_single("footer")
 	core.set_clouds(false)
 
-	if not have_bg then
+	mm_game_theme.set_game_single("header", gamedetails)
+	mm_game_theme.set_game_single("footer", gamedetails)
 
+	if not have_bg then
 		if core.settings:get_bool("menu_clouds") then
 			core.set_clouds(true)
 		else
 			mm_game_theme.set_dirt_bg()
 		end
 	end
-
-	mm_game_theme.set_game("footer",gamedetails)
-	mm_game_theme.set_game("header",gamedetails)
-
-	mm_game_theme.gameid = gamedetails.id
 end
 
 --------------------------------------------------------------------------------
-function mm_game_theme.clear(identifier)
+function mm_game_theme.clear_single(identifier)
 	core.set_background(identifier,"")
 end
 
 --------------------------------------------------------------------------------
-function mm_game_theme.set_generic(identifier)
+function mm_game_theme.set_engine_single(identifier)
 	--try texture pack first
 	if mm_game_theme.texturepack ~= nil then
 		local path = mm_game_theme.texturepack .. DIR_DELIM .."menu_" ..
@@ -123,25 +110,17 @@ function mm_game_theme.set_generic(identifier)
 		end
 	end
 
-	if mm_game_theme.defaulttexturedir ~= nil then
-		local path = mm_game_theme.defaulttexturedir .. DIR_DELIM .."menu_" ..
-										identifier .. ".png"
-		if core.set_background(identifier,path) then
-			return true
-		end
+	local path = defaulttexturedir .. DIR_DELIM .. "menu_" .. identifier .. ".png"
+	if core.set_background(identifier, path) then
+		return true
 	end
 
 	return false
 end
 
 --------------------------------------------------------------------------------
-function mm_game_theme.set_game(identifier, gamedetails)
-
-	if gamedetails == nil then
-		return false
-	end
-
-	mm_game_theme.set_music(gamedetails)
+function mm_game_theme.set_game_single(identifier, gamedetails)
+	assert(gamedetails ~= nil)
 
 	if mm_game_theme.texturepack ~= nil then
 		local path = mm_game_theme.texturepack .. DIR_DELIM ..
@@ -194,10 +173,18 @@ function mm_game_theme.set_dirt_bg()
 end
 
 --------------------------------------------------------------------------------
-function mm_game_theme.set_music(gamedetails)
+function mm_game_theme.stop_music()
 	if mm_game_theme.music_handle ~= nil then
 		core.sound_stop(mm_game_theme.music_handle)
 	end
+end
+
+--------------------------------------------------------------------------------
+function mm_game_theme.set_music(gamedetails)
+	mm_game_theme.stop_music()
+
+	assert(gamedetails ~= nil)
+
 	local music_path = gamedetails.path .. DIR_DELIM .. "menu" .. DIR_DELIM .. "theme"
 	mm_game_theme.music_handle = core.sound_play(music_path, true)
 end
diff --git a/builtin/mainmenu/init.lua b/builtin/mainmenu/init.lua
index 8d2bb2693..dccb1c540 100644
--- a/builtin/mainmenu/init.lua
+++ b/builtin/mainmenu/init.lua
@@ -89,7 +89,7 @@ local function init_globals()
 	menudata.worldlist:set_sortmode("alphabetic")
 
 	mm_game_theme.init()
-	mm_game_theme.reset()
+	mm_game_theme.set_engine() -- This is just a fallback.
 
 	-- Create main tabview
 	local tv_main = tabview_create("maintab", {x = 15.5, y = 7.1}, {x = 0, y = 0})
diff --git a/builtin/mainmenu/settings/dlg_settings.lua b/builtin/mainmenu/settings/dlg_settings.lua
index 3073be5c1..19055455e 100644
--- a/builtin/mainmenu/settings/dlg_settings.lua
+++ b/builtin/mainmenu/settings/dlg_settings.lua
@@ -692,8 +692,19 @@ local function buttonhandler(this, fields)
 end
 
 
+local function eventhandler(event)
+	if event == "DialogShow" then
+		-- Don't show the "MINETEST" header behind the dialog.
+		mm_game_theme.set_engine(true)
+		return true
+	end
+
+	return false
+end
+
+
 function create_settings_dlg()
-	local dlg = dialog_create("dlg_settings", get_formspec, buttonhandler, nil)
+	local dlg = dialog_create("dlg_settings", get_formspec, buttonhandler, eventhandler)
 
 	dlg.data.page_id = update_filtered_pages("")
 
diff --git a/builtin/mainmenu/tab_about.lua b/builtin/mainmenu/tab_about.lua
index 4eb1c8b55..2998cf872 100644
--- a/builtin/mainmenu/tab_about.lua
+++ b/builtin/mainmenu/tab_about.lua
@@ -122,6 +122,7 @@ end
 return {
 	name = "about",
 	caption = fgettext("About"),
+
 	cbf_formspec = function(tabview, name, tabdata)
 		local logofile = defaulttexturedir .. "logo.png"
 		local version = core.get_version()
@@ -196,6 +197,7 @@ return {
 
 		return fs
 	end,
+
 	cbf_button_handler = function(this, fields, name, tabdata)
 		if fields.homepage then
 			core.open_url("https://www.minetest.net")
@@ -210,4 +212,10 @@ return {
 			core.open_dir(core.get_user_path())
 		end
 	end,
+
+	on_change = function(type)
+		if type == "ENTER" then
+			mm_game_theme.set_engine()
+		end
+	end,
 }
diff --git a/builtin/mainmenu/tab_content.lua b/builtin/mainmenu/tab_content.lua
index 2a184cd2c..8e92025f1 100644
--- a/builtin/mainmenu/tab_content.lua
+++ b/builtin/mainmenu/tab_content.lua
@@ -46,6 +46,7 @@ end
 
 local function on_change(type)
 	if type == "ENTER" then
+		mm_game_theme.set_engine()
 		update_packages()
 	end
 end
@@ -171,7 +172,7 @@ local function handle_doubleclick(pkg)
 		packages = nil
 
 		mm_game_theme.init()
-		mm_game_theme.reset()
+		mm_game_theme.set_engine()
 	end
 end
 
@@ -225,7 +226,7 @@ local function handle_buttons(tabview, fields, tabname, tabdata)
 		packages = nil
 
 		mm_game_theme.init()
-		mm_game_theme.reset()
+		mm_game_theme.set_engine()
 		return true
 	end
 
diff --git a/builtin/mainmenu/tab_local.lua b/builtin/mainmenu/tab_local.lua
index 38041e2d0..c35a3f6fb 100644
--- a/builtin/mainmenu/tab_local.lua
+++ b/builtin/mainmenu/tab_local.lua
@@ -53,11 +53,10 @@ end
 
 -- Apply menu changes from given game
 function apply_game(game)
-	core.set_topleft_text(game.name)
 	core.settings:set("menu_last_game", game.id)
 	menudata.worldlist:set_filtercriteria(game.id)
 
-	mm_game_theme.update("singleplayer", game) -- this refreshes the formspec
+	mm_game_theme.set_game(game)
 
 	local index = filterlist.get_current_index(menudata.worldlist,
 		tonumber(core.settings:get("mainmenu_last_selected_world")))
@@ -396,7 +395,6 @@ local function main_button_handler(this, fields, name, tabdata)
 		create_world_dlg:set_parent(this)
 		this:hide()
 		create_world_dlg:show()
-		mm_game_theme.update("singleplayer", current_game())
 		return true
 	end
 
@@ -413,7 +411,6 @@ local function main_button_handler(this, fields, name, tabdata)
 				delete_world_dlg:set_parent(this)
 				this:hide()
 				delete_world_dlg:show()
-				mm_game_theme.update("singleplayer",current_game())
 			end
 		end
 
@@ -431,7 +428,6 @@ local function main_button_handler(this, fields, name, tabdata)
 				configdialog:set_parent(this)
 				this:hide()
 				configdialog:show()
-				mm_game_theme.update("singleplayer",current_game())
 			end
 		end
 
@@ -439,27 +435,24 @@ local function main_button_handler(this, fields, name, tabdata)
 	end
 end
 
-local function on_change(type, old_tab, new_tab)
-	if (type == "ENTER") then
+local function on_change(type)
+	if type == "ENTER" then
 		local game = current_game()
 		if game then
 			apply_game(game)
+		else
+			mm_game_theme.set_engine()
 		end
 
 		if singleplayer_refresh_gamebar() then
 			ui.find_by_name("game_button_bar"):show()
 		end
-	else
+	elseif type == "LEAVE" then
 		menudata.worldlist:set_filtercriteria(nil)
 		local gamebar = ui.find_by_name("game_button_bar")
 		if gamebar then
 			gamebar:hide()
 		end
-		core.set_topleft_text("")
-		-- If new_tab is nil, a dialog is being shown; avoid resetting the theme
-		if new_tab then
-			mm_game_theme.update(new_tab,nil)
-		end
 	end
 end
 
diff --git a/builtin/mainmenu/tab_online.lua b/builtin/mainmenu/tab_online.lua
index 5bf088d49..d93f45dcf 100644
--- a/builtin/mainmenu/tab_online.lua
+++ b/builtin/mainmenu/tab_online.lua
@@ -416,9 +416,11 @@ local function main_button_handler(tabview, fields, name, tabdata)
 	return false
 end
 
-local function on_change(type, old_tab, new_tab)
-	if type == "LEAVE" then return end
-	serverlistmgr.sync()
+local function on_change(type)
+	if type == "ENTER" then
+		mm_game_theme.set_engine()
+		serverlistmgr.sync()
+	end
 end
 
 return {