Broken camera
I've recorded the bug. Watch the video:
https://www.youtube.com/watch?v=nemgKFbFu3A&feature=youtu.be

This was a tricky one to reproduce, but we think we found the bug and squashed it.
Please let us know if it happens again.
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ChelseaDT commented
This has been reported yes , but a extra report never hurts just helps to remind the team to fix it , ill pass it on again :)
Thanks!
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VirtualJohn commented
This just started happening to me, I'd left the screen alone to read some forum posts and must have been about 20 minutes before I came back and started moving again. It seems to be moving the mouse while clicking that sets off the violent display movement for me. One refresh later and it's fine again. Odd
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Erling Ekholt Kristiansen commented
I think the minimap is the reason.