I run Arch Linux in a guest on a OSX 10.8.5 host. I export a directory called 'git' to the guest, where it used to mount like this as recently as a couple of weeks ago. From /etc/fstab:
git /mnt/git vboxsf uid=foo,gid=foo,rw,comment=systemd.automount 0 0
The only difference since that I can think of is that I updated Arch. Since then, the mount produces no errors, but accessing any file below /mnt/git hangs the shell.
I did a clean Arch install in a new VM, and the behavior is the same.
uname says 3.11.1-1 ARCH dated Sep 14
pacman says virtualbox-guest-modules is 4.2.18-3 dated Sep 15, and virtualbox-guest-utils is 4.2.18-1 dated Sep 6 (BEFORE the kernel update)
Anybody else experiencing this?