ssia
This seems to be a gnome-speech issue. It doesn't crash with gnome-speech 0.3.3, but the newer version does crash it. Also, test-speech in 0.3.5 appearst to be failing.
I dunno if this is related, but dasher seems to not install the dasher.schemas file, and the schemas installed in %post don't exist in the package.
In fact, the dasher.schemas file only exists in cvs, not in the tarball. However, this doesn't seem to be the cause of the crash.
gnome-speech needs a Requires: festival. the schemas file is missing in EXTRA_DIST; including as a separate SOURCE for now.