--- a/mercurial/hgweb/hgwebdir_mod.py	Thu Apr 03 11:11:31 2008 +0200
+++ b/mercurial/hgweb/hgwebdir_mod.py	Thu Apr 03 13:14:43 2008 +0200
@@ -190,7 +190,9 @@
                 if u.configbool("web", "hidden", untrusted=True):
                     continue
 
-                parts = [req.env['PATH_INFO'].rstrip('/'), name]
+                parts = [name]
+                if 'PATH_INFO' in req.env:
+                    parts.insert(0, req.env['PATH_INFO'].rstrip('/'))
                 if req.env['SCRIPT_NAME']:
                     parts.insert(0, req.env['SCRIPT_NAME'])
                 url = ('/'.join(parts).replace("//", "/")) + '/'