i refer to this support id on microsoft website. http://support.microsoft.com/kb/938810/
I have problem opening one word document after installing sp3. The solution given on the website is as follows.
To enable Office 2003 to open files that are saved in previous Word file formats, follow these steps: 1. Click Start, click Run, type regedit, and then click OK.
2. Locate and then click one of the following registry subkeys: " HKEY_CURRENT_USER\Software
3. Double-click the FilesBeforeVersion registry entry, type 0 in the Value data box, and then click OK.
However, i can't find the FileOpenBlock as mentioned in the registry.