Index: typo3/sysext/indexed_search/class.indexer.php
===================================================================
--- typo3/sysext/indexed_search/class.indexer.php	(revision 331)
+++ typo3/sysext/indexed_search/class.indexer.php	(working copy)
@@ -876,9 +876,36 @@
 		return $list;
 	}
 
+	/**
+	 * Extracts the "base href" from content string.
+	 *
+	 * @param	string		Content to analyze
+	 * @return	string		The base href or an empty string if not found
+	 */
+	public function extractBaseHref($string) {
+		if (!is_object($this->htmlParser)) {
+			$this->htmlParser = t3lib_div::makeInstance('t3lib_parseHtml');
+		}
 
+		$parts = $this->htmlParser->splitTags('base', $string);
+		foreach ($parts as $k => $v) {
+			if ($k % 2) {
+				$params = $this->htmlParser->get_tag_attributes($v, 1);
+				$firstTagName = $this->htmlParser->getFirstTagName($v); // The 'name' of the first tag
 
+				switch (strtolower($firstTagName)) {
+					case 'base':
+						$href = $params[0]['href'];
+						if ($href) {
+								// Return the first "base href" found (a single one should be present anyway)
+							return $href;
+						}
+				}
+			}
+		}
 
+		return '';
+	}
 
 
 
Index: class.crawler.php
===================================================================
--- class.crawler.php	(revision 331)
+++ class.crawler.php	(working copy)
@@ -641,6 +641,15 @@
 		$indexerObj->indexExternalUrl($url);
 		$url_qParts = parse_url($url);
 
+		$baseAbsoluteHref = $url_qParts['scheme'] . '://' . $url_qParts['host'];
+		$baseHref = $indexerObj->extractBaseHref($indexerObj->indexExternalUrl_content);
+		if (!$baseHref) {
+				// Extract base href from current URL
+			$baseHref = $baseAbsoluteHref;
+			$baseHref .= substr($url_qParts['path'], 0, strrpos($url_qParts['path'], '/'));
+		}
+		$baseHref = rtrim($baseHref, '/');
+
 			// Get URLs on this page:
 		$subUrls = array();
 		$list = $indexerObj->extractHyperLinks($indexerObj->indexExternalUrl_content);
@@ -653,7 +662,12 @@
 
 			$qParts = parse_url($subUrl);
 			if (!$qParts['scheme'])	{
-				$subUrl = $url_qParts['scheme'].'://'.$url_qParts['host'].'/'.t3lib_div::resolveBackPath($subUrl);
+				$relativeUrl = t3lib_div::resolveBackPath($subUrl);
+				if ($relativeUrl{0} === '/') {
+					$subUrl = $baseAbsoluteHref . $relativeUrl;
+				} else {
+					$subUrl = $baseHref . '/' . $relativeUrl;
+				}
 			}
 
 			$subUrls[] = $subUrl;