gtk-server-2.0.10 has a dependency on autoconf-2.5*. Since 2.60 and 2.59 occupy the same SLOT, if this package is installed, portage will want to downgrade autoconf.
Ping!
Jakub, I think "Ping!" in Bugzilla comment automatically assures an extra 3 months before I look at it again ;)
--- ChangeLog 2006-06-13 12:03:07.000000000 -0500 +++ ChangeLog.new 2006-08-16 22:47:14.000000000 -0500 @@ -2,6 +2,13 @@ # Copyright 1999-2006 Gentoo Foundation; Distributed under the GPL v2 # $Header: /var/cvsroot/gentoo-x86/x11-libs/gtk-server/ChangeLog,v 1.6 2006/06/13 17:03:07 mkennedy Exp $ +*gtk-server-2.0.12 (17 Aug 2006) + + 17 Aug 2006; Matthew Kennedy <mkennedy@gentoo.org> + gtk-server-2.0.10.ebuild, +gtk-server-2.0.12.ebuild: + DEPEND on >=sys-devel/autoconf-2.60; Resolves Bug #138196; New upstream + version. + *gtk-server-2.0.10 (13 Jun 2006) 13 Jun 2006; Matthew Kennedy <mkennedy@gentoo.org>