Comment 102 for bug 1292830

I can also confirm this behavior ever since some update in February or March. However, restarting compiz (compiz --replace &) alone "solves" the issue. No need to jump to a console or anything.

For me it is btw not black borders but a white box behind the window area that might be affected by shadows or other transparency features.

However, this only happens on the active window for me and on dropdown menus, anything that will cast a shadow of some sort.

nvidia-375 and intel-microcode are in use.