[Samba] smbtree vs nmblookup while looking for servers list

[Alexander Petukhov]

Hello everyone on the list,
can't someone pls help me to figure out why I can't see all SMB shares 
available using smbtree, while it's fine using nmblookup

    |pit at t430s:/usr/src/samba/samba-3.6.6/examples/libsmbclient$
    nmblookup -S 'WORKGROUP'
    querying WORKGROUP on 192.168.0.255
    192.168.0.86 WORKGROUP<00>
    Looking up status of 192.168.0.86
        T430S           <00> -         B <ACTIVE>
        T430S           <03> -         B <ACTIVE>
        T430S           <20> -         B <ACTIVE>
        ..__MSBROWSE__. <01> - <GROUP> B <ACTIVE>
        WORKGROUP       <1d> -         B <ACTIVE>
        WORKGROUP       <1e> - <GROUP> B <ACTIVE>
        WORKGROUP       <00> - <GROUP> B <ACTIVE>

        MAC Address = 00-00-00-00-00-00

    192.168.0.74 WORKGROUP<00>
    Looking up status of 192.168.0.74
        SCHWARZ         <00> -         B <ACTIVE>
        SCHWARZ         <03> -         B <ACTIVE>
        SCHWARZ         <20> -         B <ACTIVE>
        WORKGROUP       <1b> -         B <ACTIVE>
        WORKGROUP       <1e> - <GROUP> B <ACTIVE>
        WORKGROUP       <00> - <GROUP> B <ACTIVE>

        MAC Address = 00-00-00-00-00-00

    192.168.0.50 WORKGROUP<00>
    Looking up status of 192.168.0.50
        BLACKBERRY-7EB2 <00> -         B <ACTIVE>
        BLACKBERRY-7EB2 <03> -         B <ACTIVE>
        BLACKBERRY-7EB2 <20> -         B <ACTIVE>
        WORKGROUP       <1e> - <GROUP> B <ACTIVE>
        WORKGROUP       <00> - <GROUP> B <ACTIVE>

        MAC Address = 00-00-00-00-00-00

    pit at t430s:/usr/src/samba/samba-3.6.6/examples/libsmbclient$ smbtree
    -b -S -N
    WORKGROUP
        \\T430S                t430s server|

Acually,in XFCE/Thunar, while browsing Network I get the same result as 
using smbtree, i.e. less that really exists.
What can be the cause?
I'm on Debian Wheezy, so samba is quit old, maybe upgrading will fix the 
problem?
Thanks