F1/F4 -> strange white frame around minimap

[knorke]

when pressing F1 or F4 the minimap gets cropped. its original size turns into some strange border:
normal: http://img5.abload.de/img/screen015pjom.png

with metalview: http://img5.abload.de/img/screen013kjb1.png

only a part of the minimap gets drawn (its not resized as i thought at first, some part is cut away) but units are still drawn normal.

any idea what might cause this? i dont use any widgets.

[Societal]

I haven't seen that myself.

[zerver]

Graphics driver bug?