This package (for which I am the primary maintainer, but was built by somebody else) is currently in testing:

https://admin.fedoraproject.org/updates/perl-Ace-1.92-8.fc15

is needed to fix a chain of broken deps for perl-bioperl and perl-Bio-Graphics.

since it's already got +4 karma, perhaps just push to stable, or if it's faster, please push to a buildroot override tag so I can get going on rebuilding perl-bioperl and perl-Bio-Graphics