Just happened here too. Ubuntu 13.10 on a Macbook Retina accessing a Synology NAS.
Nautilus hung up while browsing a folder on the NAS. After killing and restarting nautilus, gvsd-afp-browse stayed at 100% cpu. Ejecting the drive did not help. It was not possible anymore to access the NAS, when trying to mount it in the network view I got "Cannot acces [nas_name]: Error sending data: broken pipe". After killing gvsd-afp-browse, I was able to access the NAS again (I had to reenter the credentials).
Just happened here too. Ubuntu 13.10 on a Macbook Retina accessing a Synology NAS.
Nautilus hung up while browsing a folder on the NAS. After killing and restarting nautilus, gvsd-afp-browse stayed at 100% cpu. Ejecting the drive did not help. It was not possible anymore to access the NAS, when trying to mount it in the network view I got "Cannot acces [nas_name]: Error sending data: broken pipe". After killing gvsd-afp-browse, I was able to access the NAS again (I had to reenter the credentials).