Hi,
I'm using a jQuery plug-in "Boxy" (http://onehackoranother.com/projects/jquery/boxy/) to open a pop-up layer and show a map on it. It works perfectly on all browsers except IE (7 & 8). Some elements like shadow of the marker & infoWindow are transparent, so that you can see background of the page.
Here's the test page: http://kostik.de/maps/create.html (click "edit" to open pop up, then watch Marker and InfoWindow-shadow).
any idea anyone?...