Error in .NET Framework v1.1 with WebUIValidation.js?

On the occasionally installation of Directory Update, we are seeing a situation where the client tries to logon to the logon form and the Log On button does not work at all.  This appears to be a known, but not fixed issue with the WebUIValidation.js script. 

One discussion thread talks about problems with the Submit button not working after the .NET Framework v1.1 SP1 is installed.  Per KB 889877, this is a known issue, but the KB fix does not seem to work.