BlueDragon.NET uses the Internet Explorer (IE) HTML rendering engine when creating PDF documents via the CFDOCUMENT tag. Changes in the recently released IE9 break this feature. Therefore, you cannot install IE9 on workstations or servers that you intend to use to create PDFs using the CFDOCUMENT tag on BlueDragon.NET; instead, you must have IE7 or IE8 installed. If you've already installed IE9, simply uninstalling it resolves the problem.
A solution for this issue will be in the BlueDragon.NET 9.0 release planned for later this year.
This issue does not affect the BlueDragon Java editons (BlueDragon JX or BlueDragon for Java EE).