I ran through the steps in that link, manual run of LUALL.exe in step 4 downloaded and installed 4 items sucessfully (2 of which were 32/64 bit definitions, don't recall the other 2).
Fired up SEPM and ran a Liveupdate from Admin > Server > Local Site > Download LiveUpdate content.
Status of SEPM LU download, screenshot shows installed downloads:
September 18, 2012 1:05:31 AM EDT: LiveUpdate succeeded. [Site: My Site] [Server: egrn-ws]
September 18, 2012 1:05:31 AM EDT: LUALL.EXE finished running. [Site: My Site] [Server: egrn-ws]
September 18, 2012 1:05:30 AM EDT: LUALL.EXE successfully updated the content. Return code = 0. [Site: My Site] [Server: egrn-ws]
September 18, 2012 1:05:28 AM EDT: No updates found for Symantec Endpoint Protection Win64 12.1 (English). [Site: My Site] [Server: egrn-ws]
September 18, 2012 1:05:28 AM EDT: No updates found for Symantec Endpoint Protection Win32 12.1 (English). [Site: My Site] [Server: egrn-ws]
September 18, 2012 1:05:27 AM EDT: No updates found for Centralized Reputation Settings 12.1. [Site: My Site] [Server: egrn-ws]
September 18, 2012 1:05:27 AM EDT: No updates found for SONAR scan engine Win32 11.0. [Site: My Site] [Server: egrn-ws]
September 18, 2012 1:05:27 AM EDT: No updates found for AP Portal List 12.1 RU2. [Site: My Site] [Server: egrn-ws]
September 18, 2012 1:05:27 AM EDT: No updates found for TruScan proactive threat scan commercial application list Win32 11.0. [Site: My Site] [Server: egrn-ws]
September 18, 2012 1:05:27 AM EDT: No updates found for SONAR scan whitelist Win64 11.0. [Site: My Site] [Server: egrn-ws]
September 18, 2012 1:05:27 AM EDT: No updates found for Virus and Spyware definitions Win32 12.1. [Site: My Site] [Server: egrn-ws]
September 18, 2012 1:05:27 AM EDT: No updates found for Intrusion Prevention signatures Win64 11.0. [Site: My Site] [Server: egrn-ws]
September 18, 2012 1:05:27 AM EDT: No updates found for Client Intrusion Detection System signatures 12.1. [Site: My Site] [Server: egrn-ws]
September 18, 2012 1:05:26 AM EDT: No updates found for Revocation Data. [Site: My Site] [Server: egrn-ws]
September 18, 2012 1:05:26 AM EDT: No updates found for SONAR scan engine Win64 11.0. [Site: My Site] [Server: egrn-ws]
September 18, 2012 1:05:26 AM EDT: No updates found for Submission Control signatures 11.0. [Site: My Site] [Server: egrn-ws]
September 18, 2012 1:05:26 AM EDT: No updates found for Submission Control signatures 12.1. [Site: My Site] [Server: egrn-ws]
September 18, 2012 1:05:26 AM EDT: No updates found for SONAR scan data 11.0. [Site: My Site] [Server: egrn-ws]
September 18, 2012 1:05:26 AM EDT: No updates found for Symantec Whitelist 12.1. [Site: My Site] [Server: egrn-ws]
September 18, 2012 1:05:25 AM EDT: No updates found for SONAR Heuristics engine 12.1. [Site: My Site] [Server: egrn-ws]
September 18, 2012 1:05:25 AM EDT: No updates found for SONAR scan whitelist Win32 11.0. [Site: My Site] [Server: egrn-ws]
September 18, 2012 1:05:25 AM EDT: No updates found for TruScan proactive threat scan commercial application list Win64 11.0. [Site: My Site] [Server: egrn-ws]
September 18, 2012 1:05:25 AM EDT: No updates found for SEPM LiveUpdate Database 12.1. [Site: My Site] [Server: egrn-ws]
September 18, 2012 1:05:25 AM EDT: No updates found for SONAR scan commercial application engine 11.0. [Site: My Site] [Server: egrn-ws]
September 18, 2012 1:05:25 AM EDT: No updates found for Extended File Attributes and Signatures 12.1 RU2. [Site: My Site] [Server: egrn-ws]
September 18, 2012 1:05:25 AM EDT: No updates found for Virus and Spyware definitions Win64 12.1. [Site: My Site] [Server: egrn-ws]
September 18, 2012 1:05:25 AM EDT: No updates found for Symantec Endpoint Protection Manager Content Catalog 12.1. [Site: My Site] [Server: egrn-ws]
September 18, 2012 1:05:25 AM EDT: No updates found for Intrusion Prevention signatures Win32 11.0. [Site: My Site] [Server: egrn-ws]
September 18, 2012 1:04:34 AM EDT: LUALL.EXE has been launched. [Site: My Site] [Server: egrn-ws]
September 18, 2012 1:04:33 AM EDT: Download started. [Site: My Site] [Server: egrn-ws]