I am trying to use PowerPoint 2010 with a slide library. When I click Upload > Publish Slides within the slide library, I get the error "This feature requires Microsoft Office PowerPoint 2007. Either the application is not installed, or your browser is not configured to support ActiveX controls." I have Office Professional Plus 2010 - is it really not compatible?? I tried temporarily enabling all the ActiveX settings to no avail. It works if I install Office Pro Plus 2007, but the users have 2010. I am able to publish from PowerPoint to SharePoint (Save & Send > Publish Slides) using the library URL, and I can also drag and drop files using Windows Explorer, but ideally we would like the Upload > Publish Slides feature to work from within the library. Any feedback is appreciated, thanks!