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/ExtendedMarkersView.java
/*
			 * (non-Javadoc)
			 * 
			 * @see org.eclipse.jface.viewers.ITreeContentProvider#getChildren(java.lang.Object)
			 */
			public Object[] getChildren(Object parentElement) {
				MarkerSupportItem[] children = ((MarkerSupportItem) parentElement)
						.getChildren();
				return getLimitedChildren(children);
			}
			/*
			 * (non-Javadoc)
			 * 
			 * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
			 */
			public Object[] getElements(Object inputElement) {
				return getLimitedChildren(((CachedMarkerBuilder) inputElement)
						.getElements());
			}
			/**
			 * Get the children limited by the marker limits.
			 * 
			 * @param children
			 * @return Object[]
			 */
			private Object[] getLimitedChildren(Object[] children) {
				int newLength = MarkerSupportInternalUtilities.getMarkerLimit();
				if (newLength > 0 && newLength < children.length) {