These special characters may appear in the PICT Preview, but won't print. The workaround is to use Symbol font for these special characters. They will then print correctly when in an EPSF file.
The characters that require Symbol font to print in an EPSF are the following:
°, ², ³, ¶, ·, ¸, ¹, º, ½, , Å, Æ, ×, ð