A new version of media-gfx/icoutils, 0.29.1, has been released. (Fixing a crash that can occur during extraction.)
The ebuild is just "cp icoutils-0.29.0.ebuild icoutils-0.29.1.ebuild" so I'm not attaching it.
+ + 06 Mar 2010; Patrick Lauer <patrick@gentoo.org> +icoutils-0.29.1.ebuild: + Bump, fixes #307985