viewppt and viewpdf do not render properly within Sharepoint via Sharepoint Connector Confluence Page Webpart

It's seems that any viewfile macro that relies on Flash doesn't work properly across the relay between Sharepoint and Confluence.

I have a Confluence page with a powerpoint (.ppt) attachment and a flash file (.swf) with the following wiki markup:

{viewppt:test.ppt}
!test.swf!

Within Sharepoint I add a Confluence page webpart that pulls in the Confluence page described above. The embedded flash file displays properly while the viewppt section shows a the flash logo with the message 'You need flash player installed to preview ppt and pdf files.'

Suspect trace:
http://confsharepoint/s/1722/1/1/_/download/resources/com.atlassian.confluence.extra.officeconnector:pptslideservlet/conversion/Slides.swf 400 BAD REQUEST

http://confsharepoint is my Sharepoint url. My Confluence url is actually http://maleko:8031. It seems that it's trying to download the result of the viewppt from the wrong url.