[Orgmode] Problem with HTML_CONTAINER_CLASS property

[Jan Janak]

Hello,

I am using the HTML_CONTAINER_CLASS property in one of my documents to
append additional classes to the corresponding <div> in the HTML
document I export to:

* Subsection
:PROPERTIES:
:HTML_CONTAINER_CLASS: span-9 last
:END:

When I publish the document, the resulting HTML code looks like this:
<div id="outline-container-1" class="outline-2 span-9">

The class "last" is missing. I also verified that if I add more
classes to the list, only the first one "span-9" makes it to the HTML
code.

Is this a feature or a bug? I am using the latest org-mode version
from git (6.36trans with HEAD c32d7) and Emacs 23.2.1.

Thanks!

-Jan