It's not much different from -r2, drops in a Ubuntu/Debian patch or two by upgrading patch level
x86 stable
+ 11 Jul 2009; <chainsaw@gentoo.org> + gtk-engines-ubuntulooks-0.9.12-r3.ebuild: + Marked stable on AMD64 for bug #277103; tested on a dual Opteron 2354. Last arch on bug; closing as resolved.