Philippe Verdy asked: > What is, in Unicode the BiDi behavior of PUAs?
Read the documentation, Philippe. UAX #9 and the UCD tell you some info about the bidi behavior of PUA characters; and if you then go look at the data file, in 30 seconds you can find: E000;<Private Use, First>;Co;0;L;;;;;N;;;;; F8FF;<Private Use, Last>;Co;0;L;;;;;N;;;;; I believe that IE is conformant. Rick