Mouse Performance in Other Applications when Unity is Running

Hey guys, ever since the release of Unity 5, it has been very difficult to multitask with a Unity Scene open. Over the course of about half an hour to an hour, other applications become steadily less and less responsive to mouse input (though, keyboard input is generally still snappy). The affected applications include Visual Studio, Chrome, and Firefox, though I'm sure there are others. A restart of Unity fixes this problem immediately. Does anyone else have this problem, or have any ideas as to the cause?

Windows 7 64
Unity 5.0.1f1