I'm stating this at the start to be clear, I CANNOT provide pictures of this anymore as I never thought about it at the time but if I come across it again I'll SS it...
Anyways, currently, if you have a priest who still has Inner Fire on from when it had charges (wotlk etc), the game is reading it at a stacked buff. What I mean by this is say you still have your 32 charges of inner fire, it will give you 32x(or however many charges it has) 10% armour and spell power. So take 10% of your current spellpower or armour and multiple it by the number of stacks you have, this will be the value of spellpower and armour you will have... This lasts at max for only an hour. I don't know if this will be particularly useful to anyone, however it has potential despite it being hard to come across.
Also for stat values, I only noticed this bug because my priest had 85% armour (I didn't check sp).
If this is deemed useless just remove it I don't care, I just figured I'd share this incase someone may be able to think of something clever (level 90 boost on a toon with it still up for example?)
And again, if I come across it again I'll take a SS, but my priest's buff fell off so I can't SS it...