Hey Micheal, i'm sorry, i tried to delete that post but i couldn't find out to. I'm pretty sure that this has nothing to do with Zookeeper, it just probably happened to kick in right after i installed ZK. Also i've noticed today that it doesn't happen when using the Ctrl+R navigation shortcut, but only when using the MMB click nav, which clears up ZK of any of my prior assumption i'd say.
Cheers,
A.