With gmpc-0.19.0 in the tree, it would be nice to also have the corresponding bump to the mdcover plugin. Renaming the ebuild works.
+*gmpc-mdcover-0.19.0 (02 Oct 2009) + + 02 Oct 2009; Samuli Suominen <ssuominen@gentoo.org> + +gmpc-mdcover-0.19.0.ebuild: + Version bump wrt #287200, thanks to Nick Bowler for reporting.