I seem to have the same problem. It is a Win XP Pro machine, with all the updates. When I try to join a domain, it asks for a user who has authorization to do so. It connects to the server just fine cause it notifies me when I enter the wrong user/pass. But when I enter the correct one, after about 20 seconds it displays an error message - "The specified server cannot perform the requested operation".
Curiously enough, on another network, it connects to the domain just fine, however it randomly disconnects after an hour or so, from the domain. That is the reason we replaced the computer for a while and brought it to our office for testing and inspection. Only to discover that here it doesn't connect to the domain at all. It can browse all of the shared network resources, including the servers. Other XP computers on the network work fine.
Wether these problems are connected I have yet to find out. I did a totall reinstall to the aflicted XP machine, but the problem persists. I do not know yet if it's the same on the other network with the periodic diconnects.
One more thing to note is that I connected our regional Microsoft support and the guy on the other end of the line after a few minutes of asking questions admited that his computer (Win XP Pro) has the same problem with the periodic disonnects from the domain and the loss of shared network resources.
The computer that we replaced the problematic one with is working fine,(Win XP Pro) so there should be no problem with the cables.
So does someone have any more thoughts on this ?