Hi, I just renamed the 2.6.0 ebuild, it worked. Cheers
+*mkvtoolnix-2.7.0 (26 Apr 2009) + + 26 Apr 2009; Patrick Lauer <patrick@gentoo.org> +mkvtoolnix-2.7.0.ebuild: + Bump to 2.7.0, fixes #267493