I don't know how it happend, but a colleagues version of Word 2007 recently started printing a document properties summary page at the end of each print job. It took me about 20 minutes searching the Internet for a solution to this problem (even Office's help doesn't seem to have any information on this *feature*), so I've decided to put my solution here.

1. Click the 'Office Button' (top-left corner of the window) then 'Print'
2. Click 'Options' (bottom-left corner of the print window)
3. Choose the 'Display' section
4. Untick 'Print document properties'
5. Click OK to all the windows and you're done