gnash 0.8.5 passes this string to the freetype library to match,
using function FcNameParse().
But freetype essentially matches the name on the font family
attribute only, so it tries and fails to find fonts with font family
"DejaVu Sans Bold", and returns a default sans-serif font instead.
(Observed with freetype2 2.3.7)
In fact the string used by flash is present as the "fullname"
attribute in the fonts. Freetype doesn't allow for a simple match on
the "fullname" attribute, so we enumerate all the fonts find a match.
I've not checked whether gnash 0.8.6 or 0.8.7 show the same behaviour.
Also, one could argue that freetype should be enhanced instead of
gnash.