UPDATE: It's very important to have a closing separator in the MHTML document, otherwise there are known issues in IE7 on Vista or Windows 7. The details are here. In the previous post I described what data: URIs are and how they are useful to reduce the number of HTTP requests. Now, the problem with data: URIs is that they are not supported by IE < 8. But, thanks to this article (in Russian), her
![MHTML - when you need data: URIs in IE7 and under](https://cdn-ak-scissors.b.st-hatena.com/image/square/2ed40af5a23be983f27fa8b582222aea5e129542/height=288;version=1;width=512/http%3A%2F%2Fwww.phpied.com%2Fwp-content%2Fuploads%2F2017%2F11%2F94lxJ2Cz_400x400.jpg)