<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
IE9. Dropping doesn't work. A portlet just returns to its old position.
IE9. If IE has a single tab with the Portal example, initial dragging causes IE9 to be hidden. Sometimes it is reproducible with other things. It seems only reproducible if there is a single tab in IE9.
Chrome and FireFox. Dropping causes a browser hangs on. If it doesn't happen at first drop, please try several times.