Comment 35 for bug 19066

This seems to be due to Pango, as is assumed do to the timing, since it was
enabled default around the beginning of March. If you run:

> MOZ_DISABLE_PANGO=1 firefox

you can view all the MathML sites correctly (albeit with that annoying Symbol
dialog, i.e., #133709). A ye olde post here:

http://mail.gnome.org/archives/gtk-i18n-list/2003-February/msg00042.html

seems to say that Pango and MathML (Mango?) don't play nicely. Another out
there says that Blizzard was working on a corrolary to this problem:

http://lists.gnu.org/archive/html/lilypond-devel/2004-05/msg00084.html

So, I guess you can't have both worlds right now. I suppose a "Disable Pango if
you want to read math" statement is needed in rather BOLD letters at Moz/Firefox
Fedora pages/release notes.