Problem with latest orgmode ascii export

[Robert Goldman <rpgoldman@sift.info>]

Just pulled a git update this morning, and was trying to do an
org-export as ascii.  Got the following error:

(invalid-function (interblock (start end type) (save-match-data (when
(setf func (cadr (assoc type org-export-interblocks))) (funcall func
start end)))))

This is a function that's defined by the FLET in
org-export-blocks-preprocess.  See org-exp-blocks.el, line 184.

I'm not exactly sure what is going wrong here --- is it possible that
this requires 'cl and somehow CL is not properly available?  Or the
version of CL in my emacs (Aquamacs 1.8) is not compatible?

I'll be happy to do some debugging if someone can give me some
suggestions about what line to pursue...

thanks,
r