Powerpoint File opens in Slide Show on the web

We have a Notes Db to share documents…

We noticed recently that Powerpoint documents are always opening in slide show mode on the web (IE 6.0). This is the case - on the web only - for documents posted either via the Notes client or via the web.

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On the user desktops, we have set the Folder Options in Windows Explorer not to open ppt files in same window. This setting works fine for Word/Excel and these files are opening in their native client from the web.

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Powerpoint files though are opening in Slide show mode and there doesn’t seem to be a way to come back to native Powerpoint mode. Has anyone already seen this problem? The users have Powerpoint 2000 and IE 6.0

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Thank you

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Nadine