last commit to vanilla-sources removed the last stable x86 version (2.6.26.7) and thus now portage forces the downgrade to 2.6.24. 19 Dec 2008; Raúl Porcel <armin76@gentoo.org> -vanilla-sources-2.4.36.8.ebuild, vanilla-sources-2.4.36.9.ebuild, +vanilla-sources-2.4.37.ebuild, -vanilla-sources-2.6.26.ebuild, -vanilla-sources-2.6.26.1.ebuild, -vanilla-sources-2.6.26.2.ebuild, -vanilla-sources-2.6.26.3.ebuild, -vanilla-sources-2.6.26.4.ebuild, -vanilla-sources-2.6.26.5.ebuild, -vanilla-sources-2.6.26.6.ebuild, -vanilla-sources-2.6.26.7.ebuild, -vanilla-sources-2.6.26.8.ebuild, +vanilla-sources-2.6.27.10.ebuild, +vanilla-sources-2.6.28_rc9.ebuild: Version bump
Please 'emerge --sync' and try again, this was a momentary glitch that was quickly corrected...