Index: functions.php
===================================================================
--- functions.php	(revision 10426)
+++ functions.php	(working copy)
@@ -2336,6 +2336,18 @@
 		// Relative uri
 		$pathinfo = pathinfo($url);
 
+		if (!$disable_cd_check && !file_exists($pathinfo['dirname']))
+		{
+			$url = str_replace('../', '', $url);
+			$pathinfo = pathinfo($url);
+
+			if (!file_exists($pathinfo['dirname']))
+			{
+				// fallback to "last known user page"
+				$url = generate_board_url() . '/' . $user->page['page'];
+			}
+		}
+
 		// Is the uri pointing to the current directory?
 		if ($pathinfo['dirname'] == '.')
 		{