If you are having problems viewing the pdf's online this maybe due to a recent update from adobe the makers of acrobat reader.
We recommend that you download the file(s) instead to avoid these issues. To download the file using Internet Explorer, right-click the link and select 'Save Target As'. In Firefox, right-click the link and select 'Save Link As'.
You will then need to save the file(s) to your computer, from where you should be able to view them normally.