Current stable version (3.0.12) is hopelessly outdated and the modules package doesn't compile with current stable kernels. Additionally virtualbox-ose-3.1.8 has a fix to compile with latest sys-power/iasl so we should be on the safe side when that iasl version becomes stable as well.
*** Bug 309359 has been marked as a duplicate of this bug. ***
(In reply to comment #1) > *** Bug 309359 has been marked as a duplicate of this bug. *** > Bug 309359 had dependencies on bug 305583 and bug 297633. I suppose this bug also should depend at least on bug 297633.
xf86-input-virtualbox-3.1.8-r1 bug 323125
same problem with xf86-video-virtualbox-3.1.8-r1
Since this seems to stay unattended like the bug #309359 was, let me explain what you arch guys could at least try: USE="additions" emerge -v ~virtualbox-ose-3.1.8 modprobe vboxnetflt modprobe vboxnetadp gpasswd -a $user vboxusers and then simply run-test VirtualBox once. There's no need to create and run a VM but if you feel like doing so, just download some linux ISO and boot the VM with it. Similar procedure with virtualbox-bin, after you have unmerged virtualbox-{additions,ose}: emerge -v ~virtualbox-bin-3.1.8 modprobe vboxnetflt modprobe vboxnetadp gpasswd -a $user vboxusers and then run-test the -bin version as well. For the guest packages to test (virtualbox-guest-additions, xf86-{input,video}-virtualbox) you actually need a Gentoo in a VM. As it appears to be quite awkward to just install a fully blown Gentoo into a VM to test the guest packages you may contact me and request root access to my stable amd64/x86 VMs I have set up here at home. Please note that I only consider requests being valid when the request was made via your gentoo email address signed with your official gentoo gpg signature.
amd64 stable, hope I didn't miss anything heh
stable x86, closing