Yesterday I was running 0.4.8 and could access the NAS over the network from my Western Digital Live media player. The shares have the user nobody with read-only permissions (except for an upload folder with read-write) and no rights specified for the users I created, so that Samba allows anonymous access. And it worked beautifully.
This morning I upgraded to 0.4.9 and suddenly the anonymous browsing is gone. From my computer I have to authenticate, and I couldn't get it to work yet from the media player.