I see at least part of the same error message the dkg sees, so I'm not sure if I'm seeing the same problem or something different.
When I try to launch from the command line, a gtk window pops open very briefly, and disappears with the following error: servo:~ 0$ monkeyscan WARNING: insufficient v4l2 video buffer size: vbuf[0].length=0 datalen=e1000 image=640 x 480 BGR3(33524742) python: /build/zbar-VLRB7x/zbar-0.10+doc/zbar/convert.c:619: convert_rgb_to_yuvp: Assertion `src->datalen >= (src->width * src->height * srcfmt->p.rgb.bpp)' failed. [1]+ Done gitk --all Aborted servo:~ 134$ jamie.
pgpQtKBjnbyq_.pgp
Description: PGP signature