diff -r 4417eb761ba8 -r 329887a7074c mercurial/ui.py
--- a/mercurial/ui.py	Fri Apr 06 15:16:30 2012 -0500
+++ b/mercurial/ui.py	Fri Apr 06 15:18:14 2012 -0500
@@ -483,7 +483,7 @@
             if not getattr(self.ferr, 'closed', False):
                 self.ferr.flush()
         except IOError, inst:
-            if inst.errno not in (errno.EPIPE, errno.EIO):
+            if inst.errno not in (errno.EPIPE, errno.EIO, errno.EBADF):
                 raise
 
     def flush(self):