pango 1.20.5 upgrade breaks seamonkey

[Gill Bates]

Hi,
I recently upgraded all ports including upgrading pango from 1.20_2 to 1.20_5. However now running seamonkey (1.1.9) results in:

(seamonkey-bin:630): GLib-GObject-WARNING **: invalid cast from `PangoCairoATSUIFont' to `PangoFcFont'
(seamonkey-bin:630): Pango-CRITICAL **: pango_fc_font_lock_face: assertion `PANGO_IS_FC_FONT (font)' failed
(seamonkey-bin:630): GLib-GObject-WARNING **: invalid cast from `PangoCairoATSUIFont' to `PangoFcFont'
(seamonkey-bin:630): Pango-CRITICAL **: pango_fc_font_lock_face: assertion `PANGO_IS_FC_FONT (font)' failed
/opt/ports/lib/seamonkey-1.1.9/run-mozilla.sh: line 131:   630 Bus error               "$prog" ${1+"$@"}

Seamonkey will run (albeit with some pango warnings) by deactivating pango 1.20.5 and re-activating 1.20.2.

I search Trac tickets but didn't find anything that seemed related in either seamonkey or pango.

Any comments on whether this is a bug or just an unhappy coincidence?