I noticed the following behaviour in fvwm:
A window is moved partially off the screen (less than half of it is visible), then the window is hidden (unmapped), next the window is shown again (mapped). The result is that the window is ‘wrapped around’.
An example to clarify the description (screen size is 1600x1200)
Window size is 100x100 pixels.
move the window to location -60,100
The window is shown again on position 1540,100
Is there a setting to disable the wrap around?