I do see the ZW piece, but looking at the code, I see that this piece is coming from a different directory than the others. Maybe different browsers handle the resulting URL differently, or maybe the JavaScript for this works differently in different browsers. I would recommend starting its file name with ../alfaeriemisc/ instead of /graphics.dir/alfaeriemisc/.
I do see the ZW piece, but looking at the code, I see that this piece is coming from a different directory than the others. Maybe different browsers handle the resulting URL differently, or maybe the JavaScript for this works differently in different browsers. I would recommend starting its file name with ../alfaeriemisc/ instead of /graphics.dir/alfaeriemisc/.