The FastCGI team is trying to nail down a problem that is being reported periodically that we cannot reproduce. Here is a bit of background on what's going on:
We have code inside of the FastCGI handler that needs to parse response headers so that we can send them out through IIS. There were some bugs in that code in the technical previews. We fixed the bugs for the GoLive release, but we made some invalid assumptions about the header formats that some applications produce. As a result, the GoLive release would cause certain requests to fail based on the headers returned by the FastCGI application.
On 10/31, we released an updated fcgiext.dll that we believe addresses all the issues, but these reports persist. In particluar, we've seen Wordpress and Roundcube mentioned as applications that can cause this error.
If you are one of the folks that are seeing this error, I would like to make a request that you take a look at a couple of things:
First, could you please search your hard drive for all instances of a file called fcgiext.dll. This is the FastCGI handler runtime. If you have *any* instances dated prior to 10/25/2007, please go to http://www.iis.net/default.aspx?tabid=1000057 and get the most current version to replace all instances on your machine.
Next, if the problem persists after making sure that only the latest version exists on your machine, please send me email directly with instructions to reproduce the problem. You can get me at wadeh@microsoft.com. Also note that I interested in seeing your repro as quickly as possible. I am going to be heading out to Tech-Ed Europe at the end of the week, and I would like to have this fixed before I go.
Thanks for your help! I have copied the exact error below for your reference.
-Wade
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FastCGI Error
The FastCGI Handler was unable to process the request.
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Error Details:
Error Number: 13 (0x8007000d).
Error Description: The data is invalid.
HTTP Error 500 - Server Error.
Internet Information Services (IIS)