diff -r 482d3fb47d80 -r 62ce297f214f mercurial/ui.py
--- a/mercurial/ui.py	Thu Jun 01 19:08:29 2006 +0200
+++ b/mercurial/ui.py	Thu Jun 01 15:53:43 2006 -0700
@@ -142,7 +142,10 @@
                 yield parent
 
     def extensions(self):
-        return self.configitems("extensions")
+        ret = self.configitems("extensions")
+        for i, (k, v) in enumerate(ret):
+            if v: ret[i] = (k, os.path.expanduser(v))
+        return ret
 
     def hgignorefiles(self):
         result = []