I'm working on an Internet Explorer 6 sp1 jscript problem that only occurs on one PC. Same user on a different PC has no problem. It manifests as the yellow "Errors on page" warning in the lower left corner of the browser, with details:

Line: 35
Char: 3
Error: Microsoft JScript runtime error
Object doesn't support this property or method
line = 9, col = 3 (line is offset from the start of the script block).
Error returned from property or method call.
Code: 0
URL: https://booktravel....

It was on Windows 2000, with the latest IE and Windows 2000 security roll-ups MS04-004 (Feb. 2004).

Resolution: reinstall sp1 of IE 6, to force a reinstall of the scripting engine and all the JScript bits. Only outstanding question is whether all the security hotfixes have to be reinstalled?? They appear to still be present in the IE "About" dialog.

And here are some of the fun links I found along the way:

• Windows Explorer - Errors: "EXPLORER caused an error in module..." This looks like a helpful site for resolving Windows Explorer and maybe related IE crashes.
  
• Microsoft's main Internet Explorer site
  
  • Wininet retries POST requests with a blank header. This problem occurs after you apply the Feb. 2004 832894 security update (MS04-004) or the 821814 hotfix.
    
  • Transitioning from the Microsoft Java Virtual Machine
    
• The IE 6 sp1 download site.