Yahoo has released new version on Yahoo Messenger 10: Version 10.0.0.1258. You can download the offline standalone installer file of YM 10 version 10.0.0.1258 at the links below. Of course it has more improved features in there (including fixed bug that recently been found in older version):
You are currently running Yahoo! Messenger 10.0.0.1241. A newer version, Yahoo! Messenger 10.0.0.1258 is now available. Please update your version of Yahoo! Messenger to ensure that you have the latest features and security updates. Click the “Update Now” button to continue.
Download Stand Alone Offline Installer of Yahoo Messenger 10 Version 10.0.0.1258