Confirmed!!! Stretching a window's horizontal width, on an Ambiance theme, to 1280px immediately stops this problem on the resized window, immediately making window controls highlight on mouseover and the titlebar text change when appropriate (test case, nautilus when changing folder), resizing said window back to a size below that causes the freeze to return.
Confirmed!!! Stretching a window's horizontal width, on an Ambiance theme, to 1280px immediately stops this problem on the resized window, immediately making window controls highlight on mouseover and the titlebar text change when appropriate (test case, nautilus when changing folder), resizing said window back to a size below that causes the freeze to return.
This MUST BE a Compiz bug.