I have Trillian set up and have contacts from both AIM and Yahoo imported. Whenever someone from Yahoo IMs me, it does what I have set in the Settings. Users IMing me from AIM do not show up at all - nothing happens. I have to click on the users name, have their box appear, and if they have sent me a message, only then do I get it. Obviously, I can't click on everyone on my list all day long, so sometimes I miss messages from people by hours or even a day.
Any help is appreciated!