Ceruleanstudios has released security patches for all Trillian versions. They correct recently found vulnerabilities in Yahoo connections and direct AIM connections. First reports about these issues were published about a month ago and Patches for the likewise affected Gaim messenger were released.

The new patches replace all previous patches. Trillian versions that already contain the latest patches are available for new installations. Trillian should be shutdown before installing the patch. 

Latest versions:

Trillian Basic 0.74G (full download , Download Patch G )

Trillian Pro 2.011 (Download available in members area ) 

Trillian Pro 1.0F (Download available in members area )

Trillian Pro 2.0A (Download available in members area )