[Samba] Refreshing Shares with F5 to see new files and folders under XP

[markus]

Hi all,

on a redirected home share into "My Documents" I have to hit F5 under XP 
refreshing the screen to see a newly created or modified file:

[homes]
   comment = Home Directories
   valid users = %S
   writeable = Yes
   browseable = No
   nt acl support = No
   create mask = 0644

On any other share like

[shared]
   comment = Shared Folder
   valid users = @bla
   path = /export/data/shared
   read only = No
   force create mode = 0775
   force directory mode = 0775
   browseable = Yes
   force group = bla
   inherit acls = Yes

it works perfect. So why? I've searched the net for it and it seems to 
be a known problem, but without any solution. This issue occured on 
either 3.0.14 and 3.0.22.

Any hint?

Thanks in advance
markus