I'm using beta 13 and have seen a similar problem,
but I don't think some of the previous betas were this way?
If a user visits my website, then enters the server, they
are in a "public" area/folder. If they log in at that point
everything works OK. If they go one folder deeper in the
public area and then log in they don't see the folders set for
their use. They can move up, all the way back to the web page,
with out their folders being visable. The log in button doesn't
show any one is logged in. If they click the log in button again
the folders appear.
I don't know if this is expected behavior or not, but I don't think
HFS has always worked this way.