resulted in the email client crashing as soon as some emails were scrolled through.Nothing new there, then. Thanks to MS having little idea about how to handle mime-types in Outlook (they still assume that all attachments have an associated filename with a meaningful suffix) it was easy to send a mail which would crash Outlook 2007. And if the user had previews on it would crash it as soon as it started up.
MS did provide a fix. It stopped the crash (but wouldn't actually show the text content which it was being told was there). But the fix was only in Outlook 2010 - never put into the version where the bug was actually reported.