[Samba] Strange behavior with file that have a .exe extension...

[Kevin Riggins]

I am running Samba 3.0.7 on a Redhat EL3 server.  Any action I attempt
with a file that has an .exe extension takes quite some time to occur.
For instance, a right-click to get properties menu takes 15 seconds,
when executing the file it takes 8-10 seconds to start, drag-and-drop
takes several seconds to start, etc.  If I rename the file to a
different extension or perform the same actions with another file type,
everything works just fine.

The server is a native member of a Windows 2000 domain using ADS
security.

smb.conf:

[global]
  unix charset = LOCALE
  workgroup = xxxxxx
  realm = xxxxxx.COM
  netbios name = FILESERVER
  server string = Fileserver
  security = ADS
  username map = /etc/samba/smbusers
  log level = 5
  syslog = 0
  log file = /var/log/samba/%m
  max log size = 50
  ldap ssl = no
  idmap uid = 10000-20000
  idmap gid = 10000-20000
  template primary group = "Domain Users"
  template shell = /bin/bash
  template homedir = /home/%D/%U
  winbind separator = +
  socket options = TCP_NODELAY SO_SNDBUF=8192 SO_RCVBUF=8192
  write cache size = 262144
[homes]
  comment = Home Directories
  create mask = 0600
  directory mask = 0700
  read only = no
  browseable = no
[opt]
  path = /opt
  browseable = yes
  valid users = @"xxxxxx+Domain Users"
  read only = no
[install_source]
  path = /export/samba/install_source
  browseable = yes
  read list = @"xxxxxx+Domain Users"
  write list = @xxxxxx+IT,@"xxxxxx+Domain Admins"
  valid users = @"xxxxxx+Domain Users", at xxxxxx+IT
  create mask = 0775
  directory mask = 0775

Thanks for any help,
Kevin