+++ This bug was initially created as a clone of Bug #442904 +++ We don't build yaboot completely from source -- in versions <= 1.3.13, the "source" tarball contains a prebuilt copy of libext2fs.a, which we were using. Version 1.3.14 builds against the system's static libext2fs.a. That also concerns me a little -- yaboot is far from being a standard environment; we build with -nostdlib etc. But it seems to work.
Fixed in all newer RHELs. (or at least filed a bug)