So I have an new imac 24" and a Macbook 1.83 duo core..both with leopard installed. I have MSN messenger on one space..and firefox in another space. If i'm on the firefox space, and I click on the MSN messenger icon on the dock (or if i receive a msg and click on the bouncing messenger icon) it will automatically switch to the MSN messenger space. However, on my macbook...it seems to work for a short time and then it will does not switch if i click on msn logo while in my firefox space or vice versa. I can reboot and it will work for a short time again...This only happens on my macbook. I don't know why...and it's quite annoying.