diff --git a/mods/default/nodes.lua b/mods/default/nodes.lua
index eac975999..903177709 100644
--- a/mods/default/nodes.lua
+++ b/mods/default/nodes.lua
@@ -950,7 +950,7 @@ minetest.register_node("default:quartz_block", {
 	description = "Block of Quartz",
 	stack_max = 64,
 	tiles = {"default_quartz_block_top.png", "default_quartz_block_bottom.png", "default_quartz_block_side.png"},
-	groups = {snappy=1,bendy=2,cracky=1,level=2,quartz_block=1},
+	groups = {snappy=1,cracky=1,level=2,quartz_block=1},
 	sounds = default.node_sound_stone_defaults(),
 })
 
@@ -959,7 +959,7 @@ minetest.register_node("default:quartz_chiseled", {
 	stack_max = 64,
 	is_ground_content = false,
 	tiles = {"default_quartz_chiseled_top.png", "default_quartz_chiseled_top.png", "default_quartz_chiseled_side.png"},
-	groups = {snappy=1,bendy=2,cracky=1,level=2,quartz_block=1},
+	groups = {snappy=1,cracky=1,level=2,quartz_block=1},
 	sounds = default.node_sound_stone_defaults(),
 })
 
@@ -970,7 +970,7 @@ minetest.register_node("default:quartz_pillar", {
 	is_ground_content = true,
 	on_place = minetest.rotate_node,
 	tiles = {"default_quartz_pillar_top.png", "default_quartz_pillar_top.png", "default_quartz_pillar_side.png"},
-	groups = {snappy=1,bendy=2,cracky=1,level=2,quartz_block=1},
+	groups = {snappy=1,cracky=1,level=2,quartz_block=1},
 	sounds = default.node_sound_stone_defaults(),
 })
 
diff --git a/mods/default/tools.lua b/mods/default/tools.lua
index 9e775037c..934f1f85b 100644
--- a/mods/default/tools.lua
+++ b/mods/default/tools.lua
@@ -287,7 +287,6 @@ minetest.register_tool("default:flint_and_steel", {
 			flamable = {uses=65, maxlevel=1},
 		}
 	},
-	--groups = {hot=3, igniter=1, not_in_creative_inventory=1},
 	on_use = function(itemstack, user, pointed_thing)
 		if pointed_thing.type == "node" then
 				set_fire(pointed_thing)
diff --git a/mods/doors/init.lua b/mods/doors/init.lua
index c2c3dfbc8..2b8f660c0 100644
--- a/mods/doors/init.lua
+++ b/mods/doors/init.lua
@@ -444,7 +444,7 @@ doors:register_door("doors:door_steel", {
 	description = "Iron Door",
 	stack_max = 16,
 	inventory_image = "door_steel.png",
-	groups = {snappy=1,bendy=2,cracky=1,melty=2,level=2,door=1,mesecon_effector_on=1},
+	groups = {snappy=1,cracky=1,level=2,door=1,mesecon_effector_on=1},
 	tiles_bottom = {"door_steel_b.png", "door_grey.png"},
 	tiles_top = {"door_steel_a.png", "door_grey.png"},
 	only_placer_can_open = true,
diff --git a/mods/redstone/mesecons_compatibility/init.lua b/mods/redstone/mesecons_compatibility/init.lua
index fe0a6e71d..5b3aec75d 100644
--- a/mods/redstone/mesecons_compatibility/init.lua
+++ b/mods/redstone/mesecons_compatibility/init.lua
@@ -161,7 +161,7 @@ doors:register_door("doors:door_wood", {
 doors:register_door("doors:door_steel", {
 	description = "Iron Door",
 	inventory_image = "door_steel.png",
-	groups = {snappy=1,bendy=2,cracky=1,melty=2,level=2,door=1},
+	groups = {snappy=1,cracky=1,level=2,door=1},
 	tiles_bottom = {"door_steel_b.png", "door_grey.png"},
 	tiles_top = {"door_steel_a.png", "door_grey.png"},
 	only_placer_can_open = true,
diff --git a/mods/redstone/mesecons_delayer/init.lua b/mods/redstone/mesecons_delayer/init.lua
index 30e5df56c..0cb4f20e7 100644
--- a/mods/redstone/mesecons_delayer/init.lua
+++ b/mods/redstone/mesecons_delayer/init.lua
@@ -46,9 +46,9 @@ end
 for i = 1, 4 do
 local groups = {}
 if i == 1 then 
-	groups = {bendy=2,snappy=1,dig_immediate=2,dig_by_water=1}
+	groups = {snappy=1,dig_immediate=2,dig_by_water=1}
 else
-	groups = {bendy=2,snappy=1,dig_immediate=2,dig_by_water=1, not_in_creative_inventory=1}
+	groups = {snappy=1,dig_immediate=2,dig_by_water=1, not_in_creative_inventory=1}
 end
 
 local delaytime
@@ -161,7 +161,7 @@ minetest.register_node("mesecons_delayer:delayer_on_"..tostring(i), {
 		type = "fixed",
 		fixed = boxes
 	},
-	groups = {bendy = 2, snappy = 1, dig_immediate = 2, dig_by_water=1, not_in_creative_inventory = 1},
+	groups = {snappy = 1, dig_immediate = 2, dig_by_water=1, not_in_creative_inventory = 1},
 	paramtype = "light",
 	paramtype2 = "facedir",
 	sunlight_propagates = true,
diff --git a/mods/stairs/init.lua b/mods/stairs/init.lua
index c4ca1c506..ecba8a5c9 100644
--- a/mods/stairs/init.lua
+++ b/mods/stairs/init.lua
@@ -346,7 +346,7 @@ stairs.register_stair_and_slab("stonebrick", "group:stonebrick",
 )
 
 stairs.register_stair_and_slab("quartzblock", "group:quartz_block",
-	{snappy=1,bendy=2,cracky=1,level=2},
+	{snappy=1,cracky=1,level=2},
 	{"default_quartz_block_top.png", "default_quartz_block_bottom.png", "default_quartz_block_side.png"},
 	"Quartz Stairs",
 	"Quartz Slab",