app-misc/screen should be added to quake3's dependencies. The server won't run otherwise.
*** Bug 23684 has been marked as a duplicate of this bug. ***
fixed in cvs, thanks for the heads up http://cvs.gentoo.org/cgi-bin/viewcvs.cgi/gentoo-x86/app-games/quake3/quake3-1.32b.ebuild.diff?r1=1.2&r2=1.3