If the page hasn't loaded yet it, this browser may not have a PDF plugin.
Click the M in the header and choose Google Viewer
File requires a PDF plugin.
If the page has not displayed yet, it may be that you need a PDF plugin.
A few options:
Download PDF plugin from Adobe ( link in M )
Display with Google Viewer
( Select view 'Google Viewer' under M )
If the page hasn't displayed yet, it's most likely due to an expired 'Google' login-cookie.
This can be remedied by going to gmail.com and completing your login. If you'd rather not be bothered, click image in the VIEWS to view an image (jpg) of the page.