The current transcode version is 0.6.6. You probably also might want to add the lame-patch (http://www.zebra.fh-weingarten.de/~transcode/pre/aud_aux-lame-enoding-error-0.6.6.patch) to the ebuild.
Created attachment 12459 [details, diff] transcode-0.6.6.diff, including lame-patch
Comment on attachment 12459 [details, diff] transcode-0.6.6.diff, including lame-patch 0.6.7 has been released, see #21994
now in cvs