diff -r 56f8522c3591 -r b376e8f91c16 mercurial/httppeer.py
--- a/mercurial/httppeer.py	Sun Feb 17 14:34:53 2013 -0600
+++ b/mercurial/httppeer.py	Sun Feb 17 14:41:31 2013 -0600
@@ -152,7 +152,7 @@
             raise error.RepoError(
                 _("'%s' does not appear to be an hg repository:\n"
                   "---%%<--- (%s)\n%s\n---%%<---\n")
-                % (safeurl, proto or 'no content-type', resp.read()))
+                % (safeurl, proto or 'no content-type', resp.read(1024)))
 
         if proto.startswith('application/mercurial-'):
             try: