If a PowerPoint file is uploaded as a resource for a course, it should open when clicked on, and 'open' is chosen. However, instead of the PowerPoint file opening, "index.php" opens in PowerPoint.

If you save the file and then view it, it opens okay.

The problem occurs when using Internet Explorer 6 or 7, and if the file has been created in PowerPoint 2003 or 2007. However, it only occurs if Office 2007 is installed on the computer viewing the file (i.e. it doesn't happen if Office 2003 is installed).

This makes me think the problem is with PowerPoint 2007, however I have no problem viewing PowerPoint files on other web sites. So maybe it is a Moodle/PowerPoint issue.

The problem does not happen in Firefox.

Any help would be most appreciated.