What the topic says, it fails without it. It looks to be modular xorg-ish only.
I've also tripped over this problem. If you're not using modular X you have to disable the "minimal" useflag when compiling xorg-x11 in order to get ICE. Maybe build a check into xfce4-session to see if xorg-x11 (non-modular) was built with the "minimal" useflag disabled? Versions I use: xfce4-session-4.2.3 xorg-x11-6.8.2-r8
*** Bug 145880 has been marked as a duplicate of this bug. ***
just stepped over this problem. if you dont install the xorg-x11 package itself, iceauth doesnt get pulled. as the topic says, the ebuild of xfce4-session needs to be corrected.
Fixed in CVS. Thanks for reporting.
Ok :) Please give me feedback if it's in the production portage tree (so I can drop it off my world file). thx,