The problem presents when trying to access RWW. After login you select Workstations or Servers - A dialog box appears stating that IE is not able to download an activex plugin.
Cause: The activex plugin included with SP3 is incompatible with RWW.
Solution: Remove all system references to this plugin then re-download the plugin from the RWW site.
The plugin is mstscax.dll in the System32 folder. Do a regsvr32 /u on the file Then rename it. Open regedit and remove all references to it. When you attempt to access the site again you will be prompted to install a new plugin - probably named msrdp.ocx