My MSN for some reason is a little screwy when it comes to downloading files from someone else, 90% of the time it goes really slow, even when I am on Trillian. I have no problem with AIM or Y!M though.

I usually use Trillian to sign into AIM, Y!M and MSN, though occaisonally I will actually use MSN program itself, whilst keeping Trillian on for the other two services.