I had this same problem, on a Mac. I had to delete some duplicate fonts I had, using the app Font Book. Thing is, the duplicates of these fonts had already been disabled (they had caused a problem in NeoOffice a year or so ago). I don't know why this worked. (Note I deleted what I think were the older versions of these fonts -- Arial, Times, and Palatino were a few of them.) Perhaps this sheds some light on the subject, but I don't know how.