I have an InfoPath form in a forms library that refuses to open up in a browser. I have checked the setting for that Form Library and "Display as Web Page" has been selected. I checked with our Farm Administrator and he verified for me that "Allow users to browser-enabled form templates" and "Render form templates that are browswer-enabled by users" are checked.
The weird thing is that when I modify that view and add the column "Name (linked to document with edit menu)" to the view, all of the sudden the form opens up in a browser.
Adding to the confusion is that on one machine, I have InfoPath 2003 installed and no matter what column has been selected or not, the InfoPath form in the forms library opens up in a browswer. However, on a different machine, I have InfoPath 2007 installed, and the behavior occurs that I have described above in the first paragraph