```json
{
    "title": "MSIE 6 and HTTP Compression — get the service packs!",
    "url": "https://performancezen.com/2005/09/30/msie-6-and-http-compression-get-the-service-packs/",
    "datePublished": "2005-09-30",
    "dateModified": "2005-09-30",
    "language": "en-US",
    "description": "A colleague in Germany forwarded me this interesting Microsoft knowledgebase article. Internet Explorer May Lose the First 2,048 Bytes of Data That Are Sent Back from a Web Server That…",
    "author": "spierzchala",
    "publisher": "Performance Zen"
}
```

# MSIE 6 and HTTP Compression — get the service packs!

A colleague in Germany forwarded me this interesting Microsoft knowledgebase article.
[Internet Explorer May Lose the First 2,048 Bytes of Data That Are Sent Back from a Web Server That Uses HTTP Compression](http://support.microsoft.com/default.aspx?scid=kb;en-us;Q312496)
This appears to only happen if another program registers (Real8 Download is the example given in the KB article) to use some of the more obscure Internet Name-Space handlers with Urlmon.dll. These corner cases include rarely used protocols like HTTP, HTTPS, and FTP.
Also, this only applies if you haven't bothered to patch your MSIE 6 for like, oh, two years. So, if you have bizarre behaviour with sites that use compression, use that Microsoft Update thingie you may have heard of.