LaTeX export with listings: multicolumn support broken?

[James Harkins <jamshark70@gmail.com>]

A few months ago, I wrote an academic paper with code examples, using the 
listings environment like so:

#+ATTR_LaTeX: :starred t :options [htb]
#+BEGIN_figure
#+CAPTION: Simple sequencer, implementing the musical flow from Figure 
[[basicseq_graph]].
#+NAME: basicseq
#+BEGIN_SRC {} -i
TLSequenceIterator([
	bpCmd: (name: \rumble, dur: 40),
	15,
	bpCmd: (name: \whine, dur: 20)
]);
#+END_SRC
#+END_figure

Now I need to submit revisions for the same paper, and ":starred t" is 
ignored. I get \begin{figure}, not \begin{figure*} as before.

I have also tried

#+ATTR_LaTeX: :float multicolumn :options [htb]

per documentation at [1]. I still get \begin{figure}, not \begin{figure*}.

What happened?

My paper is due on Sunday (Dec. 15). Need a fix fairly soon. If nothing 
else, I will downgrade via git.

hjh