Presentation publish fail.

I uploaded a large(ish) PDF from Keynote - about 43MB. It seemed to work. I've filled out the form for title, description & tags three times now. Each time it tells me that the PDF is being converted, and to check http://www.slideshare.net/my-slideshows for updates. However, there are no updates and no indication that I've ever uploaded a slide show. Return visits to http://www.slideshare.net/upload continue to show my PDF with the "enter details and press publish" form. What's going on?