SVG elements render black when too many present.

Hi All,
I have the following situation.

I draw many svg elements on the website and I am able to dynamically add new svg objects.

However at some point, when there are too many svg objects new ones are rendered black (with black overlay), even though they have different styles defined.

Is it possible that IE9 has some limitation as to how many svg objects can be present at once?

Thanks in advance.
Martin