In the source_install part of the ebuild support for xorg-server-1.9 should be added in a similar way as is done in the ebuild for x11-drivers/xf86-input-virtualbox-3.2.10. Reproducible: Always
Created attachment 251065 [details, diff] Support for xorg-server-1.9
Heh... I actually fixed this without finding this bug: *xf86-input-virtualbox-3.2.10-r1 (19 Oct 2010) 19 Oct 2010; Lars Wendler <polynomial-c@gentoo.org> -xf86-input-virtualbox-3.2.10.ebuild, +xf86-input-virtualbox-3.2.10-r1.ebuild: Make the driver work with xorg-server-1.9*, too.