3 Prong Leafs, What the hell?

I am growing a Northern Light auto from Nirvana. 400watt HPS 3 gallon pot. It is almost 10 weeks old and Iwas forced to top the plant becase a fan fell on it and broke the stem. this happened at 4 weeks into the grow. Now I have a nice plant that has 2 nice main colas going but all the fan eafs are 3 pronged. Is this somthing that I should be concerned about? The plant looks heathy and is budding nicely, but it is a mutant. Please advise what I should do if anything.

i have a few 3 leafed leaves around sum buds it fine mate

just depends on the strain... i found on the mango that i used to grow... when it was growing at prime conditions a lot of the fan leaves only had 3, also the black domino im growing now is doing the same... do not worry! you're baby is fine

what causes this to happen?

It could be some kinda stress or it could be genetic. I have an Og that spits out 3 leaves all thru veg.

a sign of satanic possession......flush with holy water.
most are males.

I heard that 3 prong leafs attract the Chupacabra.