You should now be able to download the new version via your agile messenger interface. I just finished downloading it and it updated just fine and all is working. if you are unable to download the file from agile messenger you can download it from their site.

Agile messenger tech support response from this morning:

Hi

Please download new version of agile messenger at Agile Mobile - MSN, ICQ, AOL, AIM, Google Talk & Yahoo! Messenger for your mobile phone

This version should fix the yahoo log in problem.

Thanks
- AgileMobile Helpdesk-