A minor nuisance to the Auto vCard functionality was fixed tonight. Outlook automatically prepends the website field with http://. If you had this value in your website string in Salesforce, the resulting vCard would have http://http\://.
This was fixed so that the website will be cleanly added to Outlook now. If you are using another PIM, let me know if this causes you problems. You can submit a support ticket here.
No changes are required if you use the Auto vCard functionality. This was all taken care of at the server level.