ManoM,
This problem is not isolated to Polygons, it happens also with
LineStrings.
Another problem with kml files that appeared recently was that the
ScreenOverlay does not render the image at all in google maps.
I just found out today while trying to help another user in the Maps
Help group. He could not longer see his screen overlay, I found a few
mistakes in his file but after fixing them I still could not see the
image in the ScreenOverlay.
Finally, I brought up my own file that has always worked and surprise,
surprise my legend does not show either. I tried Firefox, IE and
Safari on Windows XP and the legend does not show at all.
However, if I open my file in Safari for Mac the legend (image in
ScreenOverlay) still shows.
What is going on?