One day Miranda broke down - I don't know why. I was chatting with my friend and once Miranda didn't receive message from Andrzej. So I closed the window, waiting for next message from him. I saw he sent me sth then read it. I continued writing... Ane the same problem - I didn't receive message - but window was blinkin'!
Unfortunately, that problem affects everyone from my list.
System: Win XP Pro
Protocol: Gadu-gadu (polish messenger)