After emerging vcron, I get ssmtp and mailbase. Immediatly doing an emerge -p depclean, shows that mailbase is slated to be removed. My guess is that the RDEPEND file in /var/db/pkg/net-mail/ssmtp-* has all the dependencies listed on the same line and parsing fails somewhere. What is really strange is that this is not a problem on a different machine. The failing one is a workstation and the correctly working on is a network server/router.
dupe of 9779
I have a similar problem. Depclean wants to wipe out DirectFB and its dependencies even though I explicitly USE directfb. I'm just guessing here, but I think here's what's happening: I have both gtk+-1.2.10-r9 and gtk+-2.0.6-r2 installed (both have different SLOTs). gtk+-1.2.10-r9 does not need DirectFB, but gtk+-2.0.6-r2 does. Perhaps depclean is only doing its calculations with gtk+-2.0.6-r2, and ignoring gtk+-2.0.6-r2.
*** This bug has been marked as a duplicate of 9779 ***