Hi Tex
The fix i mentioned earlier was for the Server. If you go to Admin, Servers, Click the local site, and then go down to tasks and Click Show liveUpdate Downloads you can see what the currently downloaded defintions are. The fix i mentioned earlier should only update the Antivirus and antispyware definitions Win32 11.0 MicroDefsB.CurDefs to the date relevent to the file you have downloaded.
In respoense to an earlier post. In approx 1 month I have had to manually force an update twice using the aformentioned approach in an earlier post.
For you clients to receive the updated file they should only have to check in with the server and grab the update.
For your clients it is also worth checking your policy for Liveupdate.
Go to policies, then to LiveUpdate, then click the LiveUpdate content Tab.
Edit the policy and go into Security Definitions. By default the setting is set to use latest available.
If this is selected and not working I would edit the policy to select a revision (for test purposes) and select a previous revision.
If this doesnt work but your server has downloaded and installed the latest defs I would suggest it is a problem with your clients not talking to your server. Not your server not havin the correct defs.