moving some objects = remove all objects from visibility

Hi there,

I have a really annoying problem with a drawing I'm currently trying to rework.

No matter what I try - if I want to copy parts of the existing lines everything becomes invisible black. I can see the measurement handles are still there when trying CTRL+A, but nothing else and I cannot work on this drawing anymore.

At the same time - while copying stuff it seems like it is not moving as I move the mouse, but at an exponential speed. Moving the mouse a small way moves the selected parts a lot further. as soon as the mouse button is released all parts are gone / not displayed anymore.

This only happened since installing the latest version. I was on V1r1.2 before and changed to 1.3 last week.

 

Is there any possiblity to get the 1.2 again?

(I'm on win7 pro 32bit, core Duo, nvidia quadro fx1600m)