content-disposition: inline; filename=test.zip (?)

I am trying to return a ZIP file as the result of a form submit. I set
the response header as follows:

resp.setContentType("application/zip");
resp.setHeader("Content-Disposition", "inline; filename=test.zip");

However, when the dialog comes up to ask the user what to do with the
response, it defaults the filename test.zip.event

Is there a way I can suppress the suggestion that the download filename
should be appended with a ".event"?

David R Robison
Open Roads Consulting, Inc.
http://www.openroadsconsulting.com