Transport endpoint is not connected

[Romanenko M.A.]

I administer Samba 2.0.7 on Debian Linux (kernel 2.2.17, libc6 2.2). When trying to mount samba shares from Windows 98 workstations sometime the process failed with error message:
[...]
[2001/02/12 17:32:21, 1] smbd/server.c:main(641)
  smbd version 2.0.7 started.
  Copyright Andrew Tridgell 1992-1998
[2001/02/12 17:32:21, 1] smbd/files.c:file_init(216)
  file_init: Information only: requested 10000 open files, 1014 are available.
[2001/02/12 17:32:21, 0] lib/util_sock.c:client_addr(1045)
  getpeername failed. Error was Transport endpoint is not connected
[2001/02/12 17:32:21, 0] lib/util_sock.c:write_socket_data(540)
  write_socket_data: write failure. Error = Connection reset by peer
[2001/02/12 17:32:21, 0] lib/util_sock.c:write_socket(566)
  write_socket: Error writing 4 bytes to socket 4: ERRNO = Connection reset by peer
[2001/02/12 17:32:21, 0] lib/util_sock.c:send_smb(754)
  Error writing 4 bytes to client. -1. Exiting
[...]

It is appeared after upgrading some packages (not Samba). Can anybody tell me where to look for the cause of the problem?

Thank you, Mikhail.