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I am currently reduced to using Internet Explorer 6.0 so I am unable to verify this with other browsers. But at the bottom of the page listed above it provides me with a link to show my validation of my webpage, it is found here; If you would like to create a link to this page (i.e., this validation result) to make it easier to validate this page in the future or to allow others to validate your page, the URL is <http://validator.w3.org/check? uri=http%3A%2F% 2Fwww.commodus.org%2Findex.php> (or you can just add the current page to your bookmarks or hotlist). The link listed in this paragraph does not work as it has a space in it between check? and uri=, when I add a link to this it obviously comes back with an error as my browser inputs a %20 in place of the space. I was able to just remove the space and it worked fine. I just wanted to notify you of this bug. Thanks!
I think the space in the quoted URI is there to help the text wrap if the validated URI is very long. Note that only the "visible" URI has this space, the link it points to is fine. We could use zero-width space instead of the space, but I reckon it's not very well supported http://www.cs.tut.fi/~jkorpela/chars/spaces.html
Latest version of the validator does not add this space any more. That makes the results page awfully wide when validating a document with a loooong URI, but that's probably better than using a broken URI... Probably.