I used 2.4.6 version vs 2.4.4. This link exists http://www.webkitgtk.org/releases/webkitgtk-2.4.6.tar.xz Started the SlackBuild with VERSION=2.4.6 seems ok. This link has different md5sum from SBo http://www.webkitgtk.org/releases/webkitgtk-2.4.4a.tar.xz 12 hours compile time in my *old* machine 373Mbytes in tmpfs :-)