Is pdf2swf required to enable preview for office files

[wingtse]

We have openoffice installed and configured.
We have not installed the pdf2swf yet.

But the pdf preview is working already.
But office files preview is not working.
It display the error: "This document can't be previewed."

Do we need to install the pdf2swf at all?
we are running 3.2

[kbonnet]

I thought the chain was that openoffice makes a pdf from the office file and swftools (pdf2swf) transforms the pdf into a flash movie. This kind of contradicts with your findings.