I modified the sbcl-0.8.10 ebuild to use the 0.8.8 binary on ppc. It seems to work better as I never got /usr/bin/sbcl with the previous version.
Created attachment 31048 [details] dev-lisp/sbcl-0.8.10.ebuild Modified ebuild
thanks for the report. applied your changes to sbcl-0.8.10.ebuild