[dhoulb]

I do run into this fairly regularly. The mb_ functions are solid, but I was hitting something the other day where a character, I think it was NBSP, was causing a string to output empty in 5.4 (but was working fine in 5.3).

I think there's something that needs to be fixed at a core level, maybe with PHP 6, that just guts how the language deals with multibyte. Even if it means making it backwards incompatible. I'd probably take the opportunity to drop the mb_ functions, namespace the entire language, and make it multibyte by default. Needs doing eventually!