The Burnmaster, the Nuka-grenade, and the Zhu-Rong v418 Chinese pistol are unaffected by the perk. The guide lists these as being affected by this perk, but the weapons aren't on the form list - this is most likely an oversight by the developers. [已核实]
Any flamers that are brought back by the Gary-23 glitch from Operation: Anchorage are also unaffected. The reason for this was probably because weapons from the expansion were not meant to be brought back, thus they are not affected by this perk. [已核实]
While fire-based, ammunition is not affected by the Pyromaniac perk.[已核实]
Even though weapons like the Shishekebab are affected by the Pyromaniac perk, the additional burning damage is not boosted.[已核实]
While this perk requires an Explosives skill of 60 to be unlocked, the only explosive items affected by the perk are the incendiary grenade and the fire bomb. This was confirmed by J. E. Sawyer to be unintentional; the perk was meant to be dependent on the Energy Weapons skill, which governs almost more common fire-based weaponry.