Here is a new msn.dll for Trillian .74 ONLY
If you are using Trillian 1.0, go to the website and get the Trillian 2.0 Beta. It should fix your problem. DO NOT install this .dll to 1.0!
.74 users: Close Trillian, get the file, put it in the Trillian folder (replace the one that's there), start Trillian.
Let us know what happens.