Hey, before I submit a bug I just wanted to make sure what I'm seeing is indeed unexpected behavior. It seems that at least the borders and connections scale strangely as a diagram is zoomed towards 1000%. I would expect the stroke of a line to scale at the same rate as the grid itself when zoomed in. For example, if at 100% zoom it appears as though the stroke of a line occupies approximately half of a grid square then I would expect the same to be true at 1000% zoom, but that does not appear to be the case. Below are some examples from the sketch tool running against nightly build 0.9.0.v20120131-1644.