Sometimes (but not always) when I select multiple object, one or more of them will suddenly move. This happens only when I select multiple objects; I have observed it using shift+click and Ctrl+A. Usually when it happens, the last object I have selected will move down and to the right, but when I did a Ctrl+A on my light layer the whole lot moved up and left. It's as if the click is triggering the move. If I notice it, I can undo the move with Ctrl+Z, and selecting the objects again does not always repeat the move. So far I have not seen this happen with a drag select. I have seen it both in standard and in Hangout mode.
Windows 7 Professional
Chrome v23.0.1271.95