+++ This bug was initially created as a clone of Bug #293300 +++ media-sound/mumble-1.2.0_beta1 tries to load media-libs/celt-0.7.0 as "libcelt.so.0.7.0", but the actually installed library is named "libcelt.so.0.0.0". Thus CELT support in Mumble is supposedly missing, but can be restored by symlinking libcelt.so.0.7.0 to libcelt.so.0.0.0. Reproducible: Always
Why did you clone bug 293300?
I had to make a symbolic link to get mumble to use the correct codec it seems to happened since *celt-0.7.1 (29 Jan 2010) as it was working before and then I did a emerge -e world on Jan 30 and had to make the symbolic link.
Mumble stopped working here too after I updated from celt-0.7.0-r2 to 0.7.1. It might be a good idea to re-introduce celt-0.7.0-r2 in portage and place a mask in mumble on higher versions. Unless those symlinks can somehow be provided by the ebuild.
*** This bug has been marked as a duplicate of bug 293300 ***