[Plugin: Rich Text Widget] Broken in WP 3.3

I’ve just come across this also. The ‘Drag Widget to side bar’ and the expand Widget Area arrow weren’t working. Disabling the plugin on my dev network site restored both.
The problem I now have is that I can’t see where the plugin has been used in the Prod network sites without being able to expand the Widget Areas

I have the same problem. There is a workaround using the accessibility mode (screen-options) to edit and move the widgets – but I hope there will be an upgrade soon

The error generate file media-upload.js, function:

// thickbox settings
var tb_position;
(function($) {
	tb_position = function() {
		var tbWindow = $('#TB_window'), width = $(window).width(), H = $(window).height(), W = ( 720 < width ) ? 720 : width;

		if ( tbWindow.size() ) {
			tbWindow.width( W - 50 ).height( H - 45 );
			$('#TB_iframeContent').width( W - 50 ).height( H - 75 );
			tbWindow.css({'margin-left': '-' + parseInt((( W - 50 ) / 2),10) + 'px'});
			if ( typeof document.body.style.maxWidth != 'undefined' )
				tbWindow.css({'top':'20px','margin-top':'0'});
		};

		return $('a.thickbox').each( function() {
			var href = $(this).attr('href');
			if ( ! href ) return;
			href = href.replace(/&width=[0-9]+/g, '');
			href = href.replace(/&height=[0-9]+/g, '');
			$(this).attr( 'href', href + '&width=' + ( W - 80 ) + '&height=' + ( H - 85 ) );
		});
	};

	$(window).resize(function(){ tb_position(); });

})(jQuery);

If this function is removed everything works OK

I’ve observed the same problem. This plugin is broken with 3.3.1 — it blocks the drag-and-drop and expand/contract arrows in the widget editor.