We create a PDF that displays fine using FireFox but IE displays an error saying that the file is damaged. If I copy the file from the windows computer to a MAC...it dispays it just fine. Using FireFox on the Windos computer shows the same error.

Any ideas?
Evan

Are you serving up the PDF file over HTTP? What if you save it as a local file and then open with Acrobat?

Via http.
We are still looking at this.

Check the content-type / content-disposition headers, and if you are serving up the PDF file via PHP, Java, or ASP.NET, check that you are not appending some HTML to the end of the response body.