+# crashes fontforge, use PUA for now -- jcn
+# SetUnicodeValue(i + 0xF0000, 0);
+/*
+PRIVATE AREA
+ In the BMP, the range 0xe000 to 0xf8ff will never be assigned to any
+ characters by the standard and is reserved for private usage. For the
+ Linux community, this private area has been subdivided further into the
+ range 0xe000 to 0xefff which can be used individually by any end-user
+ and the Linux zone in the range 0xf000 to 0xf8ff where extensions are
+ coordinated among all Linux users. The registry of the characters
+ assigned to the Linux zone is currently maintained by H. Peter Anvin
+ <Peter.Anvin@linux.org>.
+*/
+ SetUnicodeValue(i + 0xE000, 0);