mhm... don't know why this is happening... but maybe there's a function which sets your status to idle when losing focus or screen goes off... then you could try to set your away-status: when you see your buddylist do a CTRL + P on your keyboard. this will open up the preferences. now click with your finger on the dot on the right side of the screen (on the right side of "proxy"). then the list should scroll to the right where you can find a tab called "status/idle". just uncheck the box next to "change to this status when idle". does that work?! (: