I've seen a handful of workstations where DLU isn't working and a refresh never completes, it just spins forever. We've just been reimaging when it happens and it goes away. I saw this in the log but couldn't figure out how to fix it. Can anyone shed some light on what this module is trying to do?

Code:
 [DEBUG] [04/10/2013 14:20:52.437] [1616] [ZenworksWindowsService] [14] [] [SystemUpdateModule] [] [Attempting to read persisted update statuses] [] [] 
 [DEBUG] [04/10/2013 14:20:52.437] [1616] [ZenworksWindowsService] [14] [] [SystemUpdateModule] [] [Read line :   ] [] [] 
 [DEBUG] [04/10/2013 14:20:52.437] [1616] [ZenworksWindowsService] [14] [] [SystemUpdateModule] [] [Exception occurred while trying to read update status: Illegal characters in path.] [] [] 
 [DEBUG] [04/10/2013 14:20:52.437] [1616] [ZenworksWindowsService] [14] [] [SystemUpdateModule] [] [status is not complete for :   ] [] [] 
 [DEBUG] [04/10/2013 14:20:52.437] [1616] [ZenworksWindowsService] [14] [] [SystemUpdateModule] [] [writing the following to file:   
] [] [] 
 [DEBUG] [04/10/2013 14:20:52.437] [1616] [ZenworksWindowsService] [14] [] [SystemUpdateModule] [] [There are 3 updates still waiting....will sleep for 4 minutes] [] []