After meeting with user and watching form open behavior on users Win 7 machine, the form opens from link that provides input parameter to retrieve header info but header info is missing. The form correctly retrieves the questions in each section.
The form opens correctly from another Win 7 machine when this user is logged on as himself - both the header info and questions are intact.
Things I tried were to clear IE cache and InfoPath cache, restarted machine. This did not change form open behavior for this user. The header info is still missing.
Ernesto, can you suggest any other things for me to try? Perhaps I didn't fully clear the cache? What do you think?
As a side note, I discovered two other issues with the form in troubleshooting this issue but I will post as a new issue.