This blog is closed as of 2/2015. @EricLaw left Microsoft in 2012, but was named an IE MVP in '13 & an IE userAgent (http://useragents.ie) in '14.
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Proxy-Authentication breaks many applications
When I first joined Office, I worked on the team responsible for delivering Help, Templates, and ClipArt into the client applications. As we were testing our work in various simulated customer environments, we found a big problem. At least one big customer (tens of thousands of licenses) had a network...
3 Aug 2012
Warnings on Incomplete Downloads
Recently, a user sent in the following screenshot of a security warning they encountered when attempting to download the Microsoft Zune software: Obviously, we immediately attempted to reproduce the reported problem, and we found we were unable to do so – the program was recognized as legitimate...
2 Apr 2011
IE9 Standards Mode Accepts only text/css for stylesheets
I recently encountered a blog that isn’t looking right in IE9: The site renders just fine in other browsers, and when the page is put into Compatibility View by ticking the icon in the address bar: What’s going on here? It’s clear that a stylesheet isn’t...
27 Mar 2011
HTTPS and Keep-Alive Connections
As we explore network performance on the “real-world web”, one bad pattern in particular keeps recurring, and it’s not something that our many IE9 Networking Performance Improvements alone will resolve. The bad pattern is the use of Connection: close semantics for HTTPS connections...
26 Mar 2011
Content-Length in the Real World
Earlier in IE9 , we tried to change the WinINET networking component to reject as incomplete any HTTP responses for which the Content-Length header specified more bytes than the server actually sent back. It turns out that some sites and applications expect to be able to specify an incorrect Content...
9 Mar 2011
Friendly HTTP Error Pages
Internet Explorer 5 and later will show a “Friendly” HTTP Error page if the server returns certain HTTP Error status codes with a short message body. The intent is to replace a terse server message like this one: ...with a page which may be slightly more helpful to the average user...
18 Aug 2010
IE and the Accept Header
RFC 2616 describes the Accept request header as follows: The Accept request-header field can be used to specify certain media types which are acceptable for the response. Accept headers can be used to indicate that the request is specifically limited to a small set of desired types, as in the case...
1 Jul 2009
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