As the title says, the pyro creeper special mobs give you (the player) permanent fire resistance (no timer on effect). Perhaps it should instead set you on fire?

Hmmm.... this is quite possibly a derp on my end. When does it give you this effect? When it explodes? Just curious so I can reproduce :)

Ah, my friend who I share a server with says it happened with other special type creepers as well, and only when they were killed (but not just by players, it happened when creepers killed special creepers too).

Interesting.. so do you have other mods installed? I just looked through my code, and I can't see why this would be happening...

EDIT: Just reproduced it.. interesting that there's a lingering effect on them. Let me see if I can fix it :)

So... funny story.

It's vanilla.

Tested in a completely vanilla instance. If you splash a creeper with a potion and then they explode, the potion effect they had when they exploded temporarily turns into a lingering potion in that area. Going to "fix" this by specifically not giving creepers the effect; it was just for burnables anyways.

Hah, that is amusing, I guess all the potion effects will need to be removed for special creepers then. I'm glad you were able to find the cause, and I look forward to the next update!