As reported, see URL: media-libs/opencolorio/files/opencolorio-1.0.9-yaml-0.5-compat.patch.bz2: application/x-bzip2; charset=binary (size=14128) Binary files like tarballs should be distributed via distfiles. CVS (and in the future, git) doesn't handle binary files well.
Oops, forgot about this, as repoman does not trigger warning. Fixed now, thanks for the report. + 01 May 2014; Sergey Popov <pinkbyte@gentoo.org> opencolorio-1.0.9-r1.ebuild, + -files/opencolorio-1.0.9-yaml-0.5-compat.patch.bz2: + Move yaml patch to devspace, wrt bug #509106