I just made emerge sync und emerge -Dup world. It appears commonbox-utils-0.5 as available update. emerge -f commonbox-utils does not find any server who serves that version. On the Online-Database there is no 0.5 mentioned. Within the portage-tree after update there is a 0.5 version. Ebuild of 0.5 version after update is not masked for x86. For me it seems to be a little problem. Good luck Karl
It appears the commonbox-utils-0.5.ebuild was removed from portage: http://www.gentoo.org/cgi-bin/viewcvs.cgi/x11-misc/commonbox-utils/
Closing bug as commonbox-utils-0.5 is no longer in the tree.