>I may be missing something here, but I think I've read the code correctly, and I'm alerting my clients now to disable any 3-pane views they have configured -- just in case.
>
>Comments, anyone?

We're doing just the opposite here. We want everyone using the Preview Pane, to avoid possible triggers by opening the message.

However, AFAIK, no one here was infected that did not actually open the attachment.