Hi, welcome to our little rolercoaster. Lowering the priority again.
Steve Langasek verified this on sparc and said that the sparc sablevm package was build with the broken libffi2-dev package. But unlike the previous builds with '/usr/lib/.' or '/usr/lib/../lib64' this time libtool did not mess up and add rpaths and destroy the dpkg-shlibs functionality it seems. Maybe now the libdir is too broken to matter. :) Severity lowered to important as Steve suggested. MfG Goswin