diff -r 539210ed2069 -r 423eee0b0b14 mercurial/scmutil.py
--- a/mercurial/scmutil.py	Wed Feb 13 11:07:01 2013 -0800
+++ b/mercurial/scmutil.py	Wed Feb 13 12:20:10 2013 -0800
@@ -306,8 +306,7 @@
             # to a directory. Let the posixfile() call below raise IOError.
             if basename:
                 if atomictemp:
-                    if not os.path.isdir(dirname):
-                        util.ensuredirs(dirname, self.createmode)
+                    util.ensuredirs(dirname, self.createmode)
                     return util.atomictempfile(f, mode, self.createmode)
                 try:
                     if 'w' in mode:
@@ -325,8 +324,7 @@
                     if e.errno != errno.ENOENT:
                         raise
                     nlink = 0
-                    if not os.path.isdir(dirname):
-                        util.ensuredirs(dirname, self.createmode)
+                    util.ensuredirs(dirname, self.createmode)
                 if nlink > 0:
                     if self._trustnlink is None:
                         self._trustnlink = nlink > 1 or util.checknlink(f)
@@ -345,9 +343,7 @@
         except OSError:
             pass
 
-        dirname = os.path.dirname(linkname)
-        if not os.path.exists(dirname):
-            util.ensuredirs(dirname, self.createmode)
+        util.ensuredirs(os.path.dirname(linkname), self.createmode)
 
         if self._cansymlink:
             try: