diff --git a/frontend/document/document.lua b/frontend/document/document.lua
index 3d96d7592..509f9055a 100644
--- a/frontend/document/document.lua
+++ b/frontend/document/document.lua
@@ -88,7 +88,7 @@ function Document:getPageDimensions(pageno, zoom, rotation)
 		native_dimen.w, native_dimen.h = native_dimen.h, native_dimen.w
 	end
 	native_dimen:scaleBy(zoom)
-	debug("dimen for pageno", pageno, "zoom", zoom, "rotation", rotation, "is", native_dimen)
+	DEBUG("dimen for pageno", pageno, "zoom", zoom, "rotation", rotation, "is", native_dimen)
 	return native_dimen
 end
 
diff --git a/frontend/document/pdfdocument.lua b/frontend/document/pdfdocument.lua
index 0353e367c..03a3861e0 100644
--- a/frontend/document/pdfdocument.lua
+++ b/frontend/document/pdfdocument.lua
@@ -89,10 +89,10 @@ function PdfDocument:renderPage(pageno, rect, zoom, rotation)
 	-- we prefer to render the full page, if it fits into cache
 	if not Cache:willAccept(size.w * size.h / 2) then
 		-- whole page won't fit into cache
-		debug("rendering only part of the page")
+		DEBUG("rendering only part of the page")
 		-- TODO: figure out how to better segment the page
 		if not rect then
-			debug("aborting, since we do not have a specification for that part")
+			DEBUG("aborting, since we do not have a specification for that part")
 			-- required part not given, so abort
 			return
 		end
@@ -145,11 +145,11 @@ function PdfDocument:drawPage(target, x, y, rect, pageno, zoom, rotation)
 	if not tile then
 		tile = Cache:check(hash_excerpt)
 		if not tile then
-			debug("rendering")
+			DEBUG("rendering")
 			tile = self:renderPage(pageno, rect, zoom, rotation)
 		end
 	end
-	debug("now painting", tile)
+	DEBUG("now painting", tile)
 	target:blitFrom(tile.bb, x, y, rect.x - tile.excerpt.x, rect.y - tile.excerpt.y, rect.w, rect.h)
 end
 
diff --git a/frontend/settings.lua b/frontend/settings.lua
index 7a15b6be9..260cb185a 100644
--- a/frontend/settings.lua
+++ b/frontend/settings.lua
@@ -27,7 +27,7 @@ function dump(data)
 	return table.concat(out)
 end
 
-function debug(...)
+function DEBUG(...)
 	local line = ""
 	for i,v in ipairs(arg) do
 		if type(v) == "table" then
diff --git a/frontend/ui/dialog.lua b/frontend/ui/dialog.lua
index 6112c18db..da6543347 100644
--- a/frontend/ui/dialog.lua
+++ b/frontend/ui/dialog.lua
@@ -193,7 +193,7 @@ function ConfirmBox:onClose()
 end
 
 function ConfirmBox:onSelect()
-	debug("selected:", self.selected.x)
+	DEBUG("selected:", self.selected.x)
 	if self.selected.x == 1 then
 		self:ok_callback()
 	else
@@ -324,11 +324,6 @@ MenuItem = InputContainer:new{
 	shortcut = nil,
 	shortcut_style = "square",
 	_underline_container = nil,
-
-	key_events = {
-		Select = { {"Press"}, doc = "chose selected item" },
-		ShowItemDetail = { {"Right"}, doc = "show item detail" }
-	}
 }
 
 function MenuItem:init()
@@ -343,8 +338,14 @@ function MenuItem:init()
 	-- 15 for HorizontalSpan,
 	self.content_width = self.width - shortcut_icon_w - 15
 
+	-- we need this table per-instance, so we declare it here
+	self.active_key_events = {
+		Select = { {"Press"}, doc = "chose selected item" },
+	}
+
 	w = sizeUtf8Text(0, self.width, self.face, self.text, true).x
 	if w >= self.content_width then
+		self.active_key_events.ShowItemDetail = { {"Right"}, doc = "show item detail" }
 		indicator = "  >>"
 		indicator_w = sizeUtf8Text(0, self.width, self.face, indicator, true).x
 		self.text = getSubTextByWidth(self.text, self.face,
@@ -381,15 +382,17 @@ end
 
 function MenuItem:onFocus()
 	self._underline_container.color = 10
+	self.key_events = self.active_key_events
 	return true
 end
 
 function MenuItem:onUnfocus()
 	self._underline_container.color = 0
+	self.key_events = { }
 	return true
 end
 
-function MenuItem:onShowDetail()
+function MenuItem:onShowItemDetail()
 	UIManager:show(InfoMessage:new{
 		text=self.detail,
 	})
@@ -554,13 +557,6 @@ function Menu:onPrevPage()
 	return true
 end
 
-function Menu:onShowItemDetail()
-	self.layout[self.selected.y][self.selected.x]:handleEvent(
-		Event:new("ShowDetail")
-	)
-	return true
-end
-
 function Menu:onSelect()
 	UIManager:close(self)
 	self.on_select_callback(self.item_table[(self.page-1)*self.perpage+self.selected.y])
diff --git a/frontend/ui/font.lua b/frontend/ui/font.lua
index f9d77b639..b0c919114 100644
--- a/frontend/ui/font.lua
+++ b/frontend/ui/font.lua
@@ -1,4 +1,4 @@
-require "settings" -- for debug()
+require "settings" -- for DEBUG()
 
 Font = {
 	fontmap = {
@@ -54,11 +54,11 @@ function Font:getFace(font, size)
 		realname = self.fontdir.."/"..realname
 		ok, face = pcall(freetype.newFace, realname, size)
 		if not ok then
-			debug("#! Font "..font.." ("..realname..") not supported: "..face)
+			DEBUG("#! Font "..font.." ("..realname..") not supported: "..face)
 			return nil
 		end
 		self.faces[font..size] = face
-	--debug("getFace, found: "..realname.." size:"..size)
+	--DEBUG("getFace, found: "..realname.." size:"..size)
 	end
 	return { size = size, ftface = face, hash = font..size }
 end
diff --git a/frontend/ui/geometry.lua b/frontend/ui/geometry.lua
index 157993b72..0fab4dcdc 100644
--- a/frontend/ui/geometry.lua
+++ b/frontend/ui/geometry.lua
@@ -174,12 +174,12 @@ end
 check if our size is smaller than the size of the given dimension/rectangle
 ]]--
 function Geom:__lt(rect_b)
-	debug("lt:",self,rect_b)
+	DEBUG("lt:",self,rect_b)
 	if self.w < rect_b.w and self.h < rect_b.h then
-debug("lt+")
+DEBUG("lt+")
 		return true
 	end
-debug("lt-")
+DEBUG("lt-")
 	return false
 end
 
diff --git a/frontend/ui/inputevent.lua b/frontend/ui/inputevent.lua
index 81bb67d80..91d1be345 100644
--- a/frontend/ui/inputevent.lua
+++ b/frontend/ui/inputevent.lua
@@ -248,7 +248,7 @@ function Input:waitEvent(timeout_us, timeout_s)
 			ev = nil
 			break
 		end
-		debug("got error waiting for events:", ev)
+		DEBUG("got error waiting for events:", ev)
 		if ev ~= "Waiting for input failed: 4\n" then
 			-- we abort if the error is not EINTR
 			break
diff --git a/frontend/ui/reader/readerpaging.lua b/frontend/ui/reader/readerpaging.lua
index 86523a2d2..0549542b8 100644
--- a/frontend/ui/reader/readerpaging.lua
+++ b/frontend/ui/reader/readerpaging.lua
@@ -31,7 +31,7 @@ function ReaderPaging:gotoPage(number)
 	or number < 1 then
 		return false
 	end
-	debug("going to page number", number)
+	DEBUG("going to page number", number)
 
 	-- this is an event to allow other controllers to be aware of this change
 	self.ui:handleEvent(Event:new("PageUpdate", number))
@@ -44,7 +44,7 @@ function ReaderPaging:onPageUpdate(new_page_no)
 end
 
 function ReaderPaging:onGotoPercent(percent)
-	debug("goto document offset in percent:", percent)
+	DEBUG("goto document offset in percent:", percent)
 	local dest = math.floor(self.number_of_pages * percent / 100)
 	if dest < 1 then dest = 1 end
 	if dest > self.number_of_pages then
@@ -55,7 +55,7 @@ function ReaderPaging:onGotoPercent(percent)
 end
 
 function ReaderPaging:onGotoPageRel(diff)
-	debug("goto relative page:", diff)
+	DEBUG("goto relative page:", diff)
 	self:gotoPage(self.current_page + diff)
 	return true
 end
diff --git a/frontend/ui/reader/readerpanning.lua b/frontend/ui/reader/readerpanning.lua
index 3bc09fc87..7ff54309f 100644
--- a/frontend/ui/reader/readerpanning.lua
+++ b/frontend/ui/reader/readerpanning.lua
@@ -22,7 +22,7 @@ end
 
 function ReaderPanning:onPanning(args, key)
 	local dx, dy = unpack(args)
-	debug("key =", key)
+	DEBUG("key =", key)
 	-- for now, bounds checking/calculation is done in the view
 	self.view:PanningUpdate(
 		dx * self.panning_steps.normal * self.dimen.w / 100,
diff --git a/frontend/ui/reader/readerview.lua b/frontend/ui/reader/readerview.lua
index bb6687ef4..64ee266d8 100644
--- a/frontend/ui/reader/readerview.lua
+++ b/frontend/ui/reader/readerview.lua
@@ -16,7 +16,7 @@ ReaderView = WidgetContainer:new{
 }
 
 function ReaderView:paintTo(bb, x, y)
-	debug("painting", self.visible_area, "to", x, y)
+	DEBUG("painting", self.visible_area, "to", x, y)
 	local inner_offset = Geom:new{x = 0, y = 0}
 
 	-- draw surrounding space, if any
@@ -61,14 +61,14 @@ function ReaderView:onSetDimensions(dimensions)
 end
 
 function ReaderView:PanningUpdate(dx, dy)
-	debug("pan by", dx, dy)
+	DEBUG("pan by", dx, dy)
 	local old = Geom:copy(self.visible_area)
 	self.visible_area:offsetWithin(self.page_area, dx, dy)
 	if self.visible_area ~= old then
 		-- flag a repaint
 		UIManager:setDirty(self.dialog)
-		debug(self.page_area)
-		debug(self.visible_area)
+		DEBUG(self.page_area)
+		DEBUG(self.visible_area)
 	end
 	return true
 end
diff --git a/frontend/ui/reader/readerzooming.lua b/frontend/ui/reader/readerzooming.lua
index 5297a0b9d..92b88da93 100644
--- a/frontend/ui/reader/readerzooming.lua
+++ b/frontend/ui/reader/readerzooming.lua
@@ -63,13 +63,13 @@ function ReaderZooming:setZoom()
 end
 
 function ReaderZooming:onZoom(direction)
-	debug("zoom", direction)
+	DEBUG("zoom", direction)
 	if direction == "in" then
 		self.zoom = self.zoom * 1.333333
 	elseif direction == "out" then
 		self.zoom = self.zoom * 0.75
 	end
-	debug("zoom is now at", self.zoom)
+	DEBUG("zoom is now at", self.zoom)
 	self:onSetZoomMode("free")
 	self.view:ZoomUpdate(self.zoom)
 	return true
@@ -77,7 +77,7 @@ end
 
 function ReaderZooming:onSetZoomMode(what)
 	if self.zoom_mode ~= what then
-		debug("setting zoom mode to", what)
+		DEBUG("setting zoom mode to", what)
 		self.zoom_mode = what
 		self:setZoom()
 	end
diff --git a/frontend/ui/readerui.lua b/frontend/ui/readerui.lua
index 593f24293..08e5665f8 100644
--- a/frontend/ui/readerui.lua
+++ b/frontend/ui/readerui.lua
@@ -76,7 +76,7 @@ function ReaderUI:init()
 end
 
 function ReaderUI:onClose()
-	debug("closing reader")
+	DEBUG("closing reader")
 	if self.document then
 		self.document:close()
 		self.document = false
diff --git a/frontend/ui/rendertext.lua b/frontend/ui/rendertext.lua
index 32eaba389..743240916 100644
--- a/frontend/ui/rendertext.lua
+++ b/frontend/ui/rendertext.lua
@@ -13,7 +13,7 @@ function getGlyph(face, charcode)
 	end
 	local rendered_glyph = face.ftface:renderGlyph(charcode)
 	if not rendered_glyph then
-		debug("error rendering glyph (charcode=", charcode, ") for face", face)
+		DEBUG("error rendering glyph (charcode=", charcode, ") for face", face)
 		return
 	end
 	glyph = CacheItem:new{rendered_glyph}
@@ -48,7 +48,7 @@ end
 
 function sizeUtf8Text(x, width, face, text, kerning)
 	if text == nil then
-		debug("sizeUtf8Text called without text");
+		DEBUG("sizeUtf8Text called without text");
 		return
 	end
 	-- may still need more adaptive pen placement when kerning,
@@ -64,14 +64,14 @@ function sizeUtf8Text(x, width, face, text, kerning)
 			if kerning and prevcharcode then
 				local kern = face.ftface:getKerning(prevcharcode, charcode)
 				pen_x = pen_x + kern
-				--debug("prev:"..string.char(prevcharcode).." curr:"..string.char(charcode).." kern:"..kern)
+				--DEBUG("prev:"..string.char(prevcharcode).." curr:"..string.char(charcode).." kern:"..kern)
 			else
-				--debug("curr:"..string.char(charcode))
+				--DEBUG("curr:"..string.char(charcode))
 			end
 			pen_x = pen_x + glyph.ax
 			pen_y_top = math.max(pen_y_top, glyph.t)
 			pen_y_bottom = math.max(pen_y_bottom, glyph.bb:getHeight() - glyph.t)
-			--debug("ax:"..glyph.ax.." t:"..glyph.t.." r:"..glyph.r.." h:"..glyph.bb:getHeight().." w:"..glyph.bb:getWidth().." yt:"..pen_y_top.." yb:"..pen_y_bottom)
+			--DEBUG("ax:"..glyph.ax.." t:"..glyph.t.." r:"..glyph.r.." h:"..glyph.bb:getHeight().." w:"..glyph.bb:getWidth().." yt:"..pen_y_top.." yb:"..pen_y_bottom)
 			prevcharcode = charcode
 		end
 	end
@@ -80,7 +80,7 @@ end
 
 function renderUtf8Text(buffer, x, y, face, text, kerning)
 	if text == nil then
-		debug("renderUtf8Text called without text");
+		DEBUG("renderUtf8Text called without text");
 		return 0
 	end
 	-- may still need more adaptive pen placement when kerning,
@@ -94,10 +94,10 @@ function renderUtf8Text(buffer, x, y, face, text, kerning)
 			if kerning and prevcharcode then
 				local kern = face.ftface:getKerning(prevcharcode, charcode)
 				pen_x = pen_x + kern
-				--debug("prev:"..string.char(prevcharcode).." curr:"..string.char(charcode).." pen_x:"..pen_x.." kern:"..kern)
+				--DEBUG("prev:"..string.char(prevcharcode).." curr:"..string.char(charcode).." pen_x:"..pen_x.." kern:"..kern)
 				buffer:addblitFrom(glyph.bb, x + pen_x + glyph.l, y - glyph.t, 0, 0, glyph.bb:getWidth(), glyph.bb:getHeight())
 			else
-				--debug(" curr:"..string.char(charcode))
+				--DEBUG(" curr:"..string.char(charcode))
 				buffer:blitFrom(glyph.bb, x + pen_x + glyph.l, y - glyph.t, 0, 0, glyph.bb:getWidth(), glyph.bb:getHeight())
 			end
 			pen_x = pen_x + glyph.ax
diff --git a/frontend/ui/screen.lua b/frontend/ui/screen.lua
index 3dd0ebfae..67312cf3b 100644
--- a/frontend/ui/screen.lua
+++ b/frontend/ui/screen.lua
@@ -103,6 +103,6 @@ function Screen:restoreFromBB(bb)
 	if bb then
 		fb.bb:blitFullFrom(bb)
 	else
-		debug("Got nil bb in restoreFromSavedBB!")
+		DEBUG("Got nil bb in restoreFromSavedBB!")
 	end
 end
diff --git a/frontend/ui/ui.lua b/frontend/ui/ui.lua
index 0120de519..5c55bedd5 100644
--- a/frontend/ui/ui.lua
+++ b/frontend/ui/ui.lua
@@ -3,7 +3,7 @@ require "ui/inputevent"
 require "ui/widget"
 require "ui/screen"
 require "ui/dialog"
-require "settings" -- for debug(), TODO: put debug() somewhere else
+require "settings" -- for DEBUG(), TODO: put DEBUG() somewhere else
 
 
 -- we also initialize the framebuffer
@@ -136,11 +136,11 @@ function UIManager:run()
 			end
 		until all_tasks_checked
 
-		--debug("---------------------------------------------------")
-		--debug("exec stack", self._execution_stack)
-		--debug("window stack", self._window_stack)
-		--debug("dirty stack", self._dirty)
-		--debug("---------------------------------------------------")
+		--DEBUG("---------------------------------------------------")
+		--DEBUG("exec stack", self._execution_stack)
+		--DEBUG("window stack", self._window_stack)
+		--DEBUG("dirty stack", self._dirty)
+		--DEBUG("---------------------------------------------------")
 
 		-- stop when we have no window to show (bug)
 		if #self._window_stack == 0 then