Dissapearence of samba servers.

[hopkins at cowboy.biomed.com]

We have a LAN network consisting mostly of Win95 machines, with a couple
of NT boxes and 3 Linux-based Samba servers.  Throw in a VAX running
Pathworks and a partridge in a pear tree.

Anyway, it seems that since Monday all three of the Samba boxes have
dissapeared from the browse lists (from the POV of the Windows users).
Typing in \\server only gives a "Network name not found error."  However,
each of the samba servers can mount shares from the other just fine.

Anyone have a clue why this might be happening?

Running sambas 1.9.18p5, 1.9.18p6, and 2.0.0beta2.