diff --git a/mods/columnia/columnia.lua b/mods/columnia/columnia.lua
index e4fb123..1291503 100644
--- a/mods/columnia/columnia.lua
+++ b/mods/columnia/columnia.lua
@@ -18,6 +18,9 @@ if not groups then
 	groups = minetest.registered_items[craft].groups
 end
 groups.not_in_creative_inventory = 1
+groups.wood = nil
+groups.wool = nil
+groups.stone = nil
 
 if not sounds then
 	sounds = minetest.registered_items[craft].sounds
diff --git a/mods/highlandpools/init.lua b/mods/highlandpools/init.lua
index 9d25323..671c812 100644
--- a/mods/highlandpools/init.lua
+++ b/mods/highlandpools/init.lua
@@ -65,7 +65,7 @@ minetest.register_on_generated(function(minp, maxp, seed)
 	local t1 = os.clock()
 	local x0 = minp.x
 	local z0 = minp.z
-	print ("[highlandpools] chunk ("..x0.." "..y0.." "..z0..")")
+	minetest.log("verbose", "[highlandpools] chunk ("..x0.." "..y0.." "..z0..")")
 	local x1 = maxp.x
 	local y1 = maxp.y
 	local z1 = maxp.z
@@ -257,5 +257,5 @@ minetest.register_on_generated(function(minp, maxp, seed)
 
 
 	local chugent = math.ceil((os.clock() - t1) * 1000)
-	print ("[highlandpools] time "..chugent.." ms")
+	minetest.log("verbose", "[highlandpools] time "..chugent.." ms")
 end)
diff --git a/mods/highlandpools2/init.lua b/mods/highlandpools2/init.lua
index 1c96a22..35bab86 100644
--- a/mods/highlandpools2/init.lua
+++ b/mods/highlandpools2/init.lua
@@ -65,7 +65,7 @@ minetest.register_on_generated(function(minp, maxp, seed)
 	local t1 = os.clock()
 	local x0 = minp.x
 	local z0 = minp.z
-	print ("[highlandpools2] chunk ("..x0.." "..y0.." "..z0..")")
+	minetest.log("verbose", "[highlandpools2] chunk ("..x0.." "..y0.." "..z0..")")
 	local x1 = maxp.x
 	local y1 = maxp.y
 	local z1 = maxp.z
@@ -257,5 +257,5 @@ minetest.register_on_generated(function(minp, maxp, seed)
 
 
 	local chugent = math.ceil((os.clock() - t1) * 1000)
-	print ("[highlandpools2] time "..chugent.." ms")
+	minetest.log("verbose", "[highlandpools2] time "..chugent.." ms")
 end)
diff --git a/mods/mesecons/mesecons/init.lua b/mods/mesecons/mesecons/init.lua
index 3132955..11816d1 100644
--- a/mods/mesecons/mesecons/init.lua
+++ b/mods/mesecons/mesecons/init.lua
@@ -132,7 +132,7 @@ function mesecon:receptor_off(pos, rules)
 end
 
 
-print("[OK] Mesecons")
+minetest.log("action", "[OK] Mesecons")
 
 --The actual wires
 dofile(minetest.get_modpath("mesecons").."/wires.lua");
diff --git a/mods/mobs/api.lua b/mods/mobs/api.lua
index 9e2915f..1b0b7cd 100644
--- a/mods/mobs/api.lua
+++ b/mods/mobs/api.lua
@@ -496,7 +496,7 @@ local yaw = 0
 				end
 			elseif self.state == "attack" and self.attack_type == "dogfight" then
 				if not self.attack.player or not self.attack.player:getpos() then
-					print("stop attacking")
+					minetest.log("verbose", "[mobs] Mob stopped attacking")
 					self.state = "stand"
 					self:set_animation("stand")
 					return
diff --git a/mods/pipeworks/init.lua b/mods/pipeworks/init.lua
index 6964abc..fd8d6d9 100644
--- a/mods/pipeworks/init.lua
+++ b/mods/pipeworks/init.lua
@@ -124,5 +124,5 @@ if pipeworks.enable_node_breaker then dofile(pipeworks.modpath.."/node_breaker.l
 
 minetest.register_alias("pipeworks:pipe", "pipeworks:pipe_110000_empty")
 
-print("Pipeworks loaded!")
+minetest.log("action", "Pipeworks loaded!")
 
diff --git a/mods/plantlife/flowers_plus/init.lua b/mods/plantlife/flowers_plus/init.lua
index 6d3eec3..089ae9d 100644
--- a/mods/plantlife/flowers_plus/init.lua
+++ b/mods/plantlife/flowers_plus/init.lua
@@ -542,4 +542,4 @@ minetest.register_alias("flowers:cotton", "farming:string")
 minetest.register_alias("flowers:cotton_wad", "farming:string")
 
 
-print(S("[Flowers] Loaded."))
+minetest.log("action", S("[Flowers] Loaded."))
diff --git a/mods/plantlife/plants_lib/init.lua b/mods/plantlife/plants_lib/init.lua
index 8a64034..cfb71dc 100644
--- a/mods/plantlife/plants_lib/init.lua
+++ b/mods/plantlife/plants_lib/init.lua
@@ -32,7 +32,6 @@ local DEBUG = false --... except if you want to spam the console with debugging
 
 function plantslib:dbg(msg)
 	if DEBUG then
-		print("[Plantlife] "..msg)
 		minetest.log("verbose", "[Plantlife] "..msg)
 	end
 end
@@ -609,4 +608,4 @@ end
 
 
 
-print(S("[Plantlife Library] Loaded"))
+minetest.log("action", S("[Plantlife Library] Loaded"))
diff --git a/mods/plantlife/poisonivy/init.lua b/mods/plantlife/poisonivy/init.lua
index 00317ce..0820830 100644
--- a/mods/plantlife/poisonivy/init.lua
+++ b/mods/plantlife/poisonivy/init.lua
@@ -107,4 +107,4 @@ plantslib:grow_plants({
 	ground_nodes = {"default:dirt_with_grass"}
 })
 
-print(S("[Poison Ivy] Loaded."))
+minetest.log("action", S("[Poison Ivy] Loaded."))
diff --git a/mods/signs_lib/init.lua b/mods/signs_lib/init.lua
index 44b262f..c0b107a 100644
--- a/mods/signs_lib/init.lua
+++ b/mods/signs_lib/init.lua
@@ -598,7 +598,6 @@ function signs_lib.determine_sign_type(itemstack, placer, pointed_thing, locked)
 		local fdir = minetest.dir_to_facedir(dir)
 
 		local pt_name = minetest.get_node(under).name
-		print(dump(pt_name))
 		local signname = itemstack:get_name()
 
 		if fences_with_sign[pt_name] and signname == "default:sign_wall" then
@@ -954,7 +953,7 @@ function signs_lib.register_fence_with_sign(fencename, fencewithsignname)
 	minetest.register_node(":"..fencename, def)
 	minetest.register_node(":"..fencewithsignname, def_sign)
 	table.insert(signs_lib.sign_node_list, fencewithsignname)
-	print(S("Registered %s and %s"):format(fencename, fencewithsignname))
+	minetest.log("action", "[signs_lib] "..S("Registered %s and %s"):format(fencename, fencewithsignname))
 end
 
 build_char_db()
diff --git a/mods/travelnet/init.lua b/mods/travelnet/init.lua
index dec181f..d6cf807 100644
--- a/mods/travelnet/init.lua
+++ b/mods/travelnet/init.lua
@@ -78,7 +78,7 @@ travelnet.save_data = function()
       file:write( data );
       file:close();
    else
-      print("[Mod travelnet] Error: Savefile '"..tostring( path ).."' could not be written.");
+      minetest.log("error", "[travelnet] Error: Savefile '"..tostring( path ).."' could not be written.");
    end
 end
 
@@ -93,7 +93,7 @@ travelnet.restore_data = function()
       travelnet.targets = minetest.deserialize( data );
       file:close();
    else
-      print("[Mod travelnet] Error: Savefile '"..tostring( path ).."' not found.");
+      minetest.log("error", "[travelnet] Error: Savefile '"..tostring( path ).."' not found.");
    end
 end
 
diff --git a/mods/vines/init.lua b/mods/vines/init.lua
index 5d1e3f2..b7beeef 100644
--- a/mods/vines/init.lua
+++ b/mods/vines/init.lua
@@ -442,4 +442,4 @@ if minetest.get_modpath("moreblocks") and ENABLE_STAIRSPLUS then
 	)
 	table.insert(circular_saw.known_stairs, "vines:vines_block")
 end
-print("[Vines] Loaded!")
+minetest.log("action", "[vines] Loaded!")
diff --git a/mods/zcg/zcg/init.lua b/mods/zcg/zcg/init.lua
index 60cf7c2..1e01c81 100644
--- a/mods/zcg/zcg/init.lua
+++ b/mods/zcg/zcg/init.lua
@@ -92,7 +92,7 @@ end
 zcg.need_load_all = true
 
 zcg.load_all = function()
-	print("Loading all crafts, this may take some time...")
+	minetest.log("action", "[zcg]", "Loading all crafts, this may take some time...")
 	local i = 0
 	for name, item in pairs(minetest.registered_items) do
 		if (name and name ~= "") then
@@ -102,7 +102,7 @@ zcg.load_all = function()
 	end
 	table.sort(zcg.itemlist)
 	zcg.need_load_all = false
-	print("All crafts loaded !")
+	minetest.log("action", "[zcg] All crafts loaded !")
 end
 
 zcg.formspec = function(pn)