Erik (et al) is right - this prolly would cause issues - was reading the docs on the delim param:

Delimiter

Optional. String character(s) used to identify substring limits. If omitted, the space character (" ") is assumed to be the delimiter. If delimiter is a zero-length string, a single-element array containing the entire expression string is returned.

Wonder what that rational was behind that last design choice (to return the entire string instead of an array of chars) ... prolly a useful purpose in that too.