I'm definitely not keeping the mouse held down :-)
My test machine is running 10.7.4, DB 1.0.3 and CS6 and this is on a remote site. I also notice that since upgrading to CS6 the flickering of "Loading Database Schema" from remote sites is enough to give me a migraine.
I think this is a problem with CS6 though. Not impressed with CS6 at all. Seems very 'flakey' compared to 5.5