I know that in boas, it is conventional wisdom never to breed albino x albino as it greatly increases the likelihood of propagating deformed (eyeless) babies. (At least, that's been what I've been told by several boa breeders.)
I have heard rumors that there are also recessive ball python mutations that should not be bred to other homozygous recessives, but I have never had this confirmed.
I am wondering in particular (since it's probably more in my price range, ha) if there are any known issues with breeding albino x albino in ball pythons (assuming that the babies are from outcrossed, relatively unrelated lines).
Though, I'm also curious if anyone knows of or has firsthand experience with other inadvisable breeding combinations ...
Thanks!