--- linkchecker.module	2012-08-23 15:40:59.786211400 +1200
+++ linkchecker.module	2012-08-23 14:41:15.814796800 +1200
@@ -788,6 +788,7 @@
     // Only add links to database that do not exists.
     $i = 0;
     foreach ($missing_links as $url) {
+      $url = str_replace(" ", "%20", $url);
       $urlhash = md5($url);
       $link = db_fetch_object(db_query("SELECT lid FROM {linkchecker_links} WHERE urlhash = '%s'", $urlhash));
       if (!$link) {