ebuild written only for kde4 :( But http://kopeteantispam.sourceforge.net/en/index.html say: Version 0.5 released for KDE3 and KDE4 Reproducible: Always
Indeed the current ebuild is for kde4 I will try to bring a new ebuild for kde-3.5 as well Thanks for reporting
+*kopete-antispam-kde3-0.5 (13 Apr 2009) + + 13 Apr 2009; Markos Chandras <hwoarang@gentoo.org> + +kopete-antispam-kde3-0.5.ebuild: + New kopete-antispam ebuild for kde3. Fixes bug #265958 + Closing. Thanks for reporting