IssueTracker

Using the polyline demo, try making a polyline which intersects itself
http://code.google.com/apis/maps/documentation/v3/examples/polyline-complex.html

You'll notice in the screenshots that the line gets filled in with white in
IE. If you zoom in, it gets quite strange, so it didn't just become a
polygon, something else seems to be going on.

Here's an example of where we're using it, and it's completely filled in:
http://www.ruba.com/tour/Mayflower_Tours-Mediterranean_Classic_Cruise