It appears that a new build of the popular MSN 8 software was just recently released. The build number of this new build is 8.00.0022.3100 and features no noticable interface changes.
If you currently run MSN 8, the software should have automatically updated itself. If your copy of MSN 8 did not update itself, go to 'Help & Settings', click on 'About MSN', and then click on 'More Info'. When the page loads, click on 'Update MSN Now' and click the 'Update Now' button.
More info:
hxxp://client.msn.com/msn8/setting/EN/US/MSNI/updatehistory.asp