Hey,

Just found a weird bug on leaflet 0.8-dev on the CircleMaker on IE8.

When i create a GeoJSON layer of circleMarker they loose color when i remove/add them from the map.

The problem is appearing also on cluster (when he display the circleMarker the second time).

Second problem : The circleMarker on IE8 is not so circle.

Here some screen

Here a jsFiddle to test
http://jsfiddle.net/Xelloss/s6VNm/

To test on IE8 you have to run the JSFiddle and access the following url on IE8
http://jsfiddle.net/draft/