[Samba] msdfs not working on netbios aliases?

[Roland]

I encountered strange behaviour of "msdfs" when using together
with "netbios aliases".

E.g I have in smb.conf:

[global]

netbios name = server
netbios aliases = server-oldname

....

host msdfs = Yes

[share1]
	path = /var/samba/share1

[share2]
	msdfs root = Yes
	msdfs proxy = \penguin\share2

....

 From a windows (XP) machine I can now see:

\\server\share1
and
\\server\share2
where share2 is succesfully redirected as a DFS to \\penguin\share2.

But when trying to connect via the aliased name to
\\server-oldname\share1
and
\\server-oldname\share2
only share1 is seen correctly.
share2 gives an error requesting me to check my permissions.

This behaviour however is not entirely persistent.
After rebboting my client, as long as having only one redirect proxy
sometimes I can see the aliased name correctly.

Has anyone else observed this behaviour?
Am I missing something important?

Any help appreciated.

Roland