I think I found a drop shadow issue in IE.

In shadow.js - the _hideShadow function calls e.shadowElm.style.display = "none"

However, in the constructor domapi.shadow.dropShadow() the Elm is created with doIframeShield:true. This causes an IFrame to be created for IE.

The _hideShadow method only hides the shadow, not the IFrame. I believe the proper fix would be:

domapi.shadow._hideShadow = function(e){e.shadowElm.hide()};

This would cause .hide to be called on the Elm which properly cleans up the IFrame.

Cheers