to open it!? I've always used Open Office Impress to open all my power point files for school. I've never run into any problems with it until now. usually, once the file has completed downloading, it automatically opens in impress. This time, the file saves automatically. When I try to open the saved file, it asks me if I want to save it again! It also looks as though the file is not a .ppt but a .pptx Is this a new 2007 office thing? What can I do to fix this?