User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.8) Gecko/20050511 Firefox/1.0.4 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.8) Gecko/20050511 Firefox/1.0.4 When trying to close a PDF file that has been loaded from a web page my system locks up. Adobe seems to go into a loop with just a blank page showing. Reproducible: Always Steps to Reproduce: 1.Open a web page that is offering a PDF file 2.Download the PDF file, Adobe automatically opens to receive the file 3.Use the back button to return to the web page Actual Results: Adobe and Mozilla seem to go into a 'locked up loop@ Expected Results: Close Adobe and return to web page

Does it help to upgrade to version 7?

He's using Acrobat Pro. Upgrading versions is non-trivial in this case. :)

Which version of Acrobat Pro 6 are you using 6.0/6.01/6.02 ? If its not 6.02 try upgrading to the latest version of version 6.

*** This bug has been marked as a duplicate of 214137 ***