[Bug-AUCTeX] TAB key does not let me insert a non-existing label

[Scot Becker]

(sorry I can't use reftex-report-bug, it doesn't work ATM since I have
a problem in my mail setup)  I'm using a recent bzr pull of emacs
(emacs-version says  24.0.50.4) and standalone Reftex 4.34 under
Gnome/Ubuntu.  The Reftex manual leads me to believe that when looking
for a citation key I find I don't have, I can press TAB and type a new
one out which will then be inserted in the citation command I have
chosen.  The following:

C-c [ c somregex RET TAB mynewcitekey_2000 RET

should get me:

\cite{mynewcitekey_2000}

Instead all I get is "mynewcitekey_2000" echoed in the echo
area/minibuffer, and no cite key inserted.

The relevant manual section is here:

http://www.gnu.org/software/emacs/manual/html_mono/reftex.html#Creating-Citations

Can anyone confirm this behaviour?

Other RefTeX functions seem to work as advertised.
I have my bibliography file defined in reftex-default-bibliography,
rather than in a \bibliography{} line.

Scot