I recently switched from no- to multilib. In yesterday's emerge I got tens of blockers due to conflict with emul-linux-x86-xlibs-20130224. I solved as suggested in
http://forums.gentoo.org/viewtopic-t-953900.html?sid=f7a643eca8ec01540164578f372c374f and http://bugs.gentoo.org/461608 that is by adding abi_x86_32 to USE and unmasking "emul-linux-x86-xlibs-20130224-r1", but didn't really understand what I was doing. Can anybody shed some light on this USE flag and what's going on with multilib? thanks, raffaele