http://www.ymessengerblog.com/blog/2010/03/26/yahoo-messenger-for-mac-update-now-available/

"This latest version, 3.0.1.35554, includes a bug fix for display image issues, as well as a crash bug fix"

A bug was fixed that was causing crashes for users on OS X Leopard.

-Fixed the privacy feature so that you can assign individual stealth settings for your friends
-Adding Windows Live Messenger contacts is now working again
-Fixed a problem with some file transfer requests. Remember you can transfer files up to 2GB in size.
-Cleaned up some problems with receiving offline SMS text messages
-Fixed a bug with the “Sign in to mobile device” feature
-And more!

-Free voice conversations with other Messenger users on both Mac and Windows.
-Cheap PC-to-phone calls: make calls from Messenger to landline and mobile phones at low rates with Yahoo! Phone Out.
-Receive phone calls: get a phone number for your Messenger and start taking phone calls on your computer with Yahoo! Phone In. Plus, choose your area code!
-Forward calls and voice conversations to another phone number.
-Get voicemail by email.
-Numerous improvements to stability and user experience.

There are no new features in this update but we fixed a couple of crash issues, including an update to the crash reporting for Leopard users. We also made improvements to the sign in process when you’re behind a firewall. So if you’ve had issues in the past with signing in from the office or elsewhere with a firewall, please try installing this new update.

The second release of Mac 3.0 Beta 2 is now available, just in time for Apple's upcoming release of Mac OS X Leopard (10.5). This new release includes:
- Improved stability and compatibility with Mac OS X Version 10.5 (Leopard)
- Some small interface improvements, including a new Show/Hide Display Images button in the IM and chat room windows
- Improved chat room layout, with the list of chatters in a left hand, scrollable panel with age/sex/location details available on hover (if the user is sharing his/her profile)

Tabbed Messaging
Archives
Updated Emoticons
SMS

Minor bug fixes