When a library is downgraded, it's expected for new builds to link a preserved library with a version that is newer than the one that we are trying to downgrade to. Therefore, it might make sense to have FEATURES=preserve-libs skip library preservation during downgrades, or provide some other form(s) of special handling.
Hopefully we can solve this as described in bug 373341 by making sure that the soname symlinks point to the desired version to link against.
(In reply to comment #1) > Hopefully we can solve this as described in bug 373341 by making sure that > the soname symlinks point to the desired version to link against. I may be wrong but I think it fixed it indeed.
*** This bug has been marked as a duplicate of bug 373341 ***