OK, here’s another geeky one more for our own reference than anything else. If you are running a Windows 7 workstation on a Server 2003 network (including SBS 2003), the Previous Versions functionality may appear to be broken. You may see either nothing listed in the Previous Versions window, or everything may appear with the same date stamp. Windows XP workstations continue to function correctly.

There is a very quick fix to be applied to the server. Simply delete the following registry key

HKLMSYSTEMCurrentControlSetServiceslanmanserverParametersDisableDownLevelTimewarp

No reboot is required. The fix is immediate.

UPDATE: We have had a situation recently where deleting this key changed the symptoms, but did not resolve the problem. In this case we re-added the key, and set the value to “1”, which did resolve the issue successfully.