If you're an Emacs dev and had trouble updating your sources, you need to [http://permalink.gmane.org/gmane.emacs.devel/131569 follow Eli’s advice]:

{{{
Nothing should be required, except editing your
.bzr/branch/branch.conf as I described:

 Replace

  sftp://USERNAME <at> bzr.savannah.gnu.org/srv/bzr/emacs/trunk/

 with

  bzr+ssh://USERNAME <at> bzr.savannah.gnu.org/emacs/trunk/

}}}

[new:AlexSchroeder:2012-02-04 11:55 UTC]
Worked for me! Except now I realized "Autoconf version 2.65 or higher is required". :)
More strange errors and I discover I should [http://permalink.gmane.org/gmane.emacs.bugs/50675 run ./autogen.sh].

{{{
Checking for automake (need at least version 1.11)...
too old
}}}

I think this machine no longer qualifies as an Emacs dev machine!