diff -r 1f3acc30bdfe -r c2d9ef43ff6c mercurial/keepalive.py
--- a/mercurial/keepalive.py	Sun May 13 13:17:50 2012 +0200
+++ b/mercurial/keepalive.py	Sun May 13 13:18:06 2012 +0200
@@ -290,7 +290,7 @@
             # worked.  We'll check the version below, too.
         except (socket.error, httplib.HTTPException):
             r = None
-        except:
+        except: # re-raises
             # adding this block just in case we've missed
             # something we will still raise the exception, but
             # lets try and close the connection and remove it