In Joomla! version 1.5, there are two known issues with using the PDF button to view articles in PDF format.

• With Internet Explorer, pressing this button produces a blank screen. You can work around this if you right-click on the button and select "Open Link", "Open Link in New Tab", or "Open Link in New Window". The button works correctly in Firefox.
• With both Internet Explorer and Firefox, some articles don't format correctly.

These issues are a Joomla! problem, not a bug with our site. According to the Joomla! documentation site these issues are being worked on and should be corrected in a future Joomla! release.