I am running a Fedora 2 machine with Samba 3.0.7. I am using LDAP to store the user info. Everything is from stock rpms. I am using domain logins for my users. Since 3.0.6, whenever someone tries to write a file to the server, it is extremely slow. It doesn't matter whether it's a Win XP sp1, sp2 or Win2000 client but for some reason, my computer didn't have this problem. What I found out is that I had done the registry "tweak" from speedguide.net. Once I applied this registry edit, it worked on other machines too. Here is the contents of their registry file: [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters] "SackOpts"=dword:00000001 "TcpWindowSize"=dword:0003ebc0 "Tcp1323Opts"=dword:00000001 "DefaultTTL"=dword:00000040 "EnablePMTUBHDetect"=dword:00000000 "EnablePMTUDiscovery"=dword:00000001 "GlobalMaxTcpWindowSize"=dword:0003ebc0 I am not sure which line of this fixed the problem but I am sure that someone would could tell from looking at it. I am wondering what would have changed between 3.0.5 and 3.06 to have done this? Also, I am running an almost exact replica of the problematic server on another machine and I it works fine without any modifications to the client's registry. Thanks, Doug