This could be related to slow network browsing we see. You didn't note if shares are being mounted. If so, look at the fix for slow network browsing. It's the registry key that pertains to XP asking about the remote scheduled tasks that needs to be deleted.
I have a Windows 2003 Standard server with AD ,5 Windows XP home edition and 2 Windows 98.
I setup all workstation login to W2K3 domain, for those using Win98 have no problem and fast to login. But after XP login to domain, it show "apply personal seetings" and I have to wait about 5 min to success login to windows.
Why this things happen?