First day using D7, downloaded alpha 2 release today, no patches. I created a field in content types for a file to use with a Page. I then created a new content type called resource and pulled in the existing file field.
When I try to add an attachment to the resource, I get the following screen:
The message is:
An AJAX HTTP request terminated abnormally.
Debugging information follows.
I'm not at all familiar with AJAX, so not following - the only path /file I can find is under the module file, but there is no ajax subdirectory there.