dstiles - 9:06 pm on Jul 9, 2011 (gmt 0)

The problem there is probably due to the copyright data on the page. Many sites display the current year as copyright; some state the initial year of the site; and some display both. Of course, some display neither.

I would have thought SEs could tell a page's date from first-bot'ed date but the above seems more likely at the moment.