In the past couple weeks, we've had many customers reporting errors with using the xfdf post-back feature of Adobe Acrobat docuements we use.
They said this was not a problem before they upgraded to Adobe Reader 9.1.2.
I have not been able to reproduce the problem here with Adobe Reader 9.1.2, but I'm guessing that maybe their configuration is slightly different from my test configuration of machine/Adobe Reader 9.1.2...
To summarize how we use xfdf post-back:
2.) The server then processes the xfdf data.
This has always worked fine in the past, but would appear to (under some yet unspecified client-side circumstances), cause an error. Note: the server-side appears to not be the root of the problem because the same server is used with the client-machines (client-machines meaning the acrobat plug-in inside an IE browser) that do work, and also with the client-machines that don't work.
Additional note: The client-machines that do work...always work. The client-machines that don't work, never work.
Attached is a screenshot of the Microsoft Fiddler (protocol monitor tool) request and response data of the xfdf post.
Thoughts on what might be the problem?