diff -r 0ceea19182a9 -r bf9d55ed67f6 mercurial/commands.py
--- a/mercurial/commands.py	Fri Jul 01 09:01:07 2005 -0800
+++ b/mercurial/commands.py	Fri Jul 01 09:04:50 2005 -0800
@@ -299,6 +299,7 @@
     if not (source.startswith("http://") or
             source.startswith("hg://") or
             source.startswith("old-http://")):
+        source = os.path.abspath(source)
         d1 = os.stat(dest).st_dev
         d2 = os.stat(source).st_dev
         if d1 == d2: link = 1