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
.getAdapter(ResourceMapping.class);
									if (mapping != null) {
										selectedElements.add(mapping);
									}
								} else {
									selectedElements.add(resource);
								}
							}
						}
					}
				}
				builder.updateForNewSelection(selectedElements.toArray());
			}
		};
	}
	/**
	 * Return a part listener for the receiver.
	 * 
	 * @return IPartListener2
	 */
	private IPartListener2 getPartListener() {
		return new IPartListener2() {
			/*
			 * (non-Javadoc)
			 * 
			 * @see org.eclipse.ui.IPartListener2#partActivated(org.eclipse.ui.IWorkbenchPartReference)
			 */
			public void partActivated(IWorkbenchPartReference partRef) {
				
			}