I ran across this in Section 3.7.4 of http://www.unicode.org/reports/tr36/
"Use pairs of noncharacter code points in the range FDD0..FDEF. These are "super" private-use characters, and are discouraged for general interchange. The transformation would take each nibble of a byte Y, and add to FDD0 and FDE0, respectively. However, noncharacter code points may be replaced by U+FFFD ( � ) REPLACEMENT CHARACTER by some implementations, especially when they use them internally. (Again, incoming characters must never be deleted, because that can cause security problems.)"
I'm not sure if this affects the calculus of the Corrigendum. _______________________________________________ Unicode mailing list [email protected] http://unicode.org/mailman/listinfo/unicode
