Those are too early.

code/_onclick/item_attack.dm

@@ -146,7 +146,7 @@
 		visible_message("<span class='danger'>[user] has hit [src] with [I]!</span>", null, null, COMBAT_MESSAGE_RANGE)
 		//only witnesses close by and the victim see a hit message.
 		log_combat(user, src, "attacked", I)
-	take_damage(totitemdamage, I.damtype, MELEE, 1)
+	take_damage(totitemdamage, I.damtype, "melee", 1)
 
 /mob/living/attacked_by(obj/item/I, mob/living/user, attackchain_flags = NONE, damage_multiplier = 1)
 	var/list/block_return = list()

code/_onclick/other_mobs.dm

@@ -171,7 +171,7 @@
 		if(ishuman(ML))
 			var/mob/living/carbon/human/H = ML
 			affecting = H.get_bodypart(ran_zone(dam_zone))
-		var/armor = ML.run_armor_check(affecting, MELEE)
+		var/armor = ML.run_armor_check(affecting, "melee")
 		if(prob(75))
 			ML.apply_damage(rand(1,3), BRUTE, affecting, armor)
 			ML.visible_message("<span class='danger'>[name] bites [ML]!</span>", \

code/controllers/subsystem/fire_burning.dm

@@ -32,7 +32,7 @@ SUBSYSTEM_DEF(fire_burning)
 
 		if(O.resistance_flags & ON_FIRE) //in case an object is extinguished while still in currentrun
 			if(!(O.resistance_flags & FIRE_PROOF))
-				O.take_damage(10 * delta_time, BURN, FIRE, 0)
+				O.take_damage(10 * delta_time, BURN, "fire", 0)
 			else
 				O.extinguish()