>Could you somehow save the contents of the form as it is in Fox's memory (like Save Screen) ? When you are able restore this you'd may be able to differentiate between the anomaly in the memory (read : the form) or just the monitor acting strange ...

There's a command, Save Window, and it probably still works. It was introduced in FPW2.5 or so, and it saves the bitmap and probably positions of several things around the form. It saves to a .win file or a memo, in some weird internal format. It's one of those Retained in Visual FoxPro for "backward compatibility." things.