fbpanel version 4.11 has been released. Can use 4.9 ebuild. I have been using this version on amd64 for a week or so with no stability problems. Reproducible: Always Steps to Reproduce:
Version 4.12 is now available at http://fbpanel.sourceforge.net/
Just bumped it in the tree; thanks, Reilly and Kevin. Closing bug... :]