I have a user on XP x64 and she has 7.09 reader and gets an error message when she openes a PDF (or tries to) on the web.
She CAN open PDF's fine from the network or a local computer.
Uninstalled and reinstalled the program, updated to 8 reader and still no luck, downgraded to 7.09 to ensure no other problems.
You might have the user be certain to upgrade the browser to the most recent version and try a different browser if problems persist. She can also control the PDF viewing in the Preferences to display the PDF as an inline view in a browser window or save the file to her hard distk and open it later in Reader. Visit the Preferences and click Internet to change where the PDF is displayed.
ted
The author of numerous books on Acrobat, Photoshop, Illustrator and the Adobe Creative Suite, and an international speaker on Adobe Acrobat, Ted Padova is a well-known PDF guru.