I know the red hair shouldn't piss me off, but it really does. Why was his hair black in the grave then, and during the time he spent with Talia al Ghul? Was he just dyeing it himself all through Battle for the Cowl? It's just so STUPID. It's a small detail, yes, but then why bother to change it at all?
Also, someone above me said this, but brunette hair dye very rarely IF EVER has the effect of making your hair fall out.