Here SERVER2 is the old location, also notice the absence of login info, correct as that old location didn't have any

02:43:17 M: 35323904   DEBUG: DIRECTORY::CSMBDirectory::OpenDir - Using authentication url smb://xbox:xe4uq4@SERVER1/media/Music
02:43:17 M: 35942400   DEBUG:     ---- BOOKMARK START ----
02:43:17 M: 35942400   DEBUG:     Found name: Music
02:43:17 M: 35942400   DEBUG:     Found path: smb://xbox:xe4uq4@SERVER1/media/Music/
02:43:17 M: 35942400   DEBUG:       Adding bookmark:
02:43:17 M: 35942400   DEBUG:         Name: Music
02:43:17 M: 35942400   DEBUG:         Path: smb://xbox:xe4uq4@SERVER1/media/Music/
02:43:17 M: 36261888   DEBUG: CGUIMediaWindow::GetDirectory ()
02:43:17 M: 36261888   DEBUG:   ParentPath = []
02:43:17 M: 36261888   DEBUG: RetrieveMusicInfo() took 0msec
02:43:18 M: 36016128   DEBUG: CApplication::OnKey: 256 pressed, action is 7
02:43:18 M: 36261888   DEBUG: CGUIMediaWindow::GetDirectory (smb://SERVER2/media/Music/)
02:43:18 M: 36261888   DEBUG:   ParentPath = []
02:43:18 M: 36261888   DEBUG: DIRECTORY::CSMBDirectory::OpenDir - Using authentication url smb://SERVER2/media/Music
02:43:20 M: 36261888    INFO: Loading skin file: DialogOK.xml
02:43:20 M: 36261888   ERROR: SMBDirectory->GetDirectory: Unable to open directory : 'smb://SERVER2/media/Music'
                             unix_err:'2' nt_err : 'c0000122' error : 'Invalid computer name'
02:43:20 M: 36261888   ERROR: CGUIMediaWindow::GetDirectory(smb://SERVER2/media/Music/) failed
02:43:20 M: 36261888   DEBUG: CGUIMediaWindow::GetDirectory ()