Colubrids get their name from their taxonomic family, Colubridae. The way I pronounce it: Kohl-OO-brihds.
I don't know that I'd label it confusion, necessarily. I see it as more of an agreement to more than one pronunciation in a multicultural world/hobby. Additionally, I wonder how many of us are more accustomed to reading and seeing the written term, as opposed to actually hearing it from an authority in an educational lecture. I would suspect that's true for many.I was all excited to learn something new in this thread, but now all I see is that everyone is confused. Do we have something definitive? I choose to never say the word cause I'm not sure how...