I have a similar problem. It does not depend on opening a window and i have only seen it in Unity, because i do not use Unity2D. Sometimes after the login, my Desktop Icons are "tightened". On my Screenshots you can see what i mean. This does not occur in one step, but with every new bootup the Icons are more and more pulled towards each other.
** Attachment added: "before.png" https://bugs.launchpad.net/ubuntu/+source/unity/+bug/737758/+attachment/2693089/+files/before.png -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to nautilus in Ubuntu. https://bugs.launchpad.net/bugs/737758 Title: Desktop icons move after login To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/737758/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs