The mapper interface has been streamlined a bit to conform to typical Windows
standards. Right-clicking on the map now pops up a context-menu with some options and
a list of the contents on the map tile, thus averting the need for a "Look" button.
The various buttons ("find", "gen", etc) that used to be on the bottom of the object
panel are now also located in context-menus obtained by clicking on the object in the
panel.
Since the right-click on the map used to perform a delete operation (ala the icon-editor,
which has not been changed), you must now either use the context menu to select one of
the various deletes or use the more convenient SHIFT+click. Also, if you have a
three-button mouse the middle button should perform a delete.