Bug 213504 [Markers] Problems View no longer supports dragging into the Editor Area
I20071218-0800. You used to be able to drag an error into the Editor Area in order to open the associated file. I commonly use the DnD gesture to open a 'problem' but it appears that this isn't working in the new version...
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/MarkerCopyHandler.java
/**
	 * Set the workbench clipboard for the markers.
	 * 
	 * @param view
	 */
	private void setClipboard(ExtendedMarkersView view) {
		IMarker[] markers = view.getSelectedMarkers();
		String markerReport = createMarkerReport(view, markers);
		
		Object[] data;
		Transfer[] transferTypes;
		if (markerReport == null) {
			data = new Object[] { markers };
			transferTypes = new Transfer[] { MarkerTransfer.getInstance() };
		} else {
			data = new Object[] { markers, markerReport };
			transferTypes = new Transfer[] { MarkerTransfer.getInstance(),
					TextTransfer.getInstance() };
		}
		view.getClipboard().setContents(data, transferTypes);
	}
	/**
	 * Creates a plain-text report of the selected markers based on predefined
	 * properties.
	 * 
	 * @param view
	 *            the view being copied
	 * @param markers
	 * @return the marker report
	 */