Actually that is almost symbolic of the 7 part soul - if you count the parts inside the triangle you count 6 - with the triangle encompassing it all, containing it all and makes 7 ... 7 part soul ... nice spot!
thankyou, my brain provided me with that moment of brilliance. On another thought though, why is this symbol there? is it a representation, does harry draw it up and colour in a part when he's done? or is that symbol somewhere, in like a chamber and voldemort has created it will it start to fade or something when harry starts to destroy horcrux's? kind of like voldemorts lifeline?
I wonder, just on a slim chance, this could be linked to the eye of horus?
We have a thread somewhere that talks about the theory in-line with the horcrux theories and I am pretty sure that sat with a triangle somewhere?
Of course, I could be going mad as well - let me see if I can dig it up!