Potential Issue browsing Network Drives

For certain users running Windows XP SP2 they have experienced some issues connecting back to our DFS cluster, and are having 20-30 second wait times, and sometimes timing out when trying to save to the network drive with 4.0.424

Here are my exceptions I have. I excluded some software specific ones we run here. Am I missing something? Do I need to add exceptions via unc path for users having issues?

C:\documents and settings\all users\ntuser.pol
C:\windows\ntds\*.*
C:\windows\ntfrs\*.*
C:\windows\security\database\*.*
C:\windows\security\database\edb.chk
C:\windows\security\database\edbres00001.jrs
C:\windows\security\database\edbres00002.jrs
C:\Windows\security\database\secedit.sdb
C:\windows\softwaredistribution\*.*
C:\windows\system32\grouppolicy\*.*
C:\windows\system32\grouppolicy\registry.pol
C:\Windows\system32\netware\*.*
C:\windows\system32\novell\*.*
C:\windows\sysvol\domain\policies\*.*
C:\windows\sysvol\domain\scripts\*.*
C:\windows\sysvol\staging areas\*.*
C:\windows\sysvol\sysvol\*.*

 

NOT Nod32

Just wanted to shoot this out there in case someone else had this happen

 

Is scanning of network drives disabled on the clients?