Here's a roundabout way:

• Get the Greasemonkey firefox extension, install the Endless Pages script.
• Run the query, and put something on the Page Down key until you've loaded all of the results.
• Dump this in the address bar and hit enter: javascript: var imageLink = document.getElementsByTagName("a"); for (i = 0; i < imageLink.length; i++) if (/\/post\/show\//.test(imageLink[i].href)) imageLink[i].href = imageLink[i].firstChild.src.replace(/preview\//,''); alert('done');
• Use the DownThemAll extension to download all of the images linked on the page (thumbs now all point directly to the image thanks to the above).