Msg#: 4486713 posted 4:40 pm on Aug 21, 2012 (gmt 0)
Seems they are trying to pull pages from Drupal's cache.
If you do a Google search for /cache/eb91756ae6745d22433f80be4ec59445, some of the results are valid pages. If the page exists and you take a peek at the source code of the page, you'll see that they are Drupal based sites. I guess it might be an attempt to exploit some kind of vulnerability.