[rhn-users] Characters Not Displayed

[Mc Kiernan Daniel Kian]

Prior to my migrating from RHEL 5.5 to 6.0, when I used characters 
U+223b, U+227b, U+227f, U+2280 in formulae coded within OpenOffice 
Math (the formula editor) of OpenOffice 3.2.1, the document displayed 
these when viewed in OpenOffice, and an exported PDF displayed these 
when viewed with Acrobat readers.

Now, when the very same version of OpenOffice is used in RHEL 6.0, 
these character becomes invisible both in .ODTs and in .PDFs.  This 
problem obtains, in fact, whether I use the distribution of OpenOffice 
supplied by OpenOffice.org or that provided by Red Hat.

I don't know whether this problem obtains from changes in fontconfig, 
from a change in the installed set of fonts, or from some other source.

That documentation and discussion which I have encountered of 
fontconfig does not clearly distinguish character-wise fallback from 
wholesale substitution of one font for another, let alone provide a 
clear guide as to how to diagnose my present problem.