After the d/l of ImageMagick-5.4.6-3.tar.bz2 the following message appears and the build process stops !!! No message digest found. /usr/portage/media-gfx/imagemagick/files/digest-imagemagick-5.4.6 (1st line of message shown). Following the instructions to ebuild foo... works
Please emerge --clean rsync, the digest exists in portage.