I got the following unexpected response when trying to retrieve <http://cgi.ebay.com/2-Waterford-Tall-Champagne-Flutes-Lismore_W0QQitemZ360105234458QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item53d7f1d01a&_trksid=p3911.c0.m14&_trkparms=65%3A12%7C66%3A2%7C39%3A1%7C72%3A1205%7C293%3A1%7C294%3A50>:
404 Not Found
You can choose to validate the received error document for example if the URL intentionally points to one (there is also a "Validate error pages" option in the options view for this purpose).