We are dealing with a complicated issue with MS Office 2007 and the VLE. Various versions of Internet Explorer can not download the pptx format files (The Firefox browser has no problem).
Instructors: When saving files for the VLE we recommend you save them out in Office 97-2003 format. This is a good idea anyway; not all users are using Office 2007 and may have difficulty accessing Office 2007 files.
We are working with our colleagues in ISS to resolve the issue.
Comments are welcome, however if you need help or advice please contact the ISS helpdesk on tel (0113) 343 3333, or firstname.lastname@example.org.