Microsoft IE user exploit fix may break links
Microsoft Knowledge Base Article - 834489 announced an upcoming fix for the Internet Explorer username exploit that masked malicious website URLs. If you use any links that look like
http(s)://username:password@server/resource.ext
then any updated browsers will not follow them. The article provides workarounds for server backends and client scripting. The HTTP login URL format was never in the official standard. Note that this does not affect FTP login URLs.