I have had several clients on our network lose the ability to print PDF files in a web browser after they have Internet Explorer 8 Installed. So far this has only occurred on Vista SP1 clients. The PDF will open without issue in the web browser but when trying to print the preview pane is blank and Internet Explorer Crashes. If we downgrade to IE 7 printing PDF files is fine. If we try to save a PDF flie from within IE8 it saves without issue. We can then open the PDF File and print if need be. I have seen other complaints about this issue but none of the possible fixes I have found solve the issue. Any thoughts or points to a possible fix would be much appreciated. I have attached a screenshot of where the print preview is blank when printing.