For the past week or so, I've noticed a change of behavior for emacs frames: when I create a new frame, it appears at the default size and location, as normal. If I then move and resize it using the window systems "snap to side" functionality (that is, I drag the window from the titlebar to the edge of the display, the window manager shows me a preview of the window full-height and half-screen width, placed on that edge), and then release it. Until sometime a week or two ago, the frame was correctly moved and resized; today (and for a fews days, at least), its upper-right corner is placed in the same position as before, but the size is unchanged. If I repeat the operation a second time, the window is placed in the same position, but this time it *is* resized.