I have an OO Writer document that uses a font called BWGRKL. BWGRKL is a
biblical Greek font that maps Greek characters and accents into individual
character spots. For example, the word katechethes (kappa alpha tau eta chi eta
theta eta sigma) is typed in as "kathch,qhj". (h = eta, q= theta, j=final sigma)
In particular, note that the comma (,) serves as an accent. When the comma is
typed using BWGRKL, an accent is placed over the preceding eta (h). 

When I type this in to OO writer, it displays perfectly. When I print it, I get
the Greek characters, but the comma is printed as a "," rather than as the
accent over the eta. (This works fine in Microsoft Word. Sun Star Office 7 has
the same problem as OpenOffice 1.1) OpenOffice Calc has the same problem as OO
writer, so it's probably part of a common component. I'll upload representative
text and spreadsheet documents along with the BWGRKL font. The font is produced
by BibleWorks (http://www.bibleworks.com) and ships with their BibleWorks
software package.