Bug 16181 Tab key doesn't work in editor when 'Insert spaces for tabs' enabled
Using integration build 0515, pressing Tab in an editor window doesn't do anything when 'Insert spaces for tabs' is selected. The editor is marked as unsaved, but no spaces appear.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitEditor.java
if (o instanceof MarkerAnnotation) {
							marker= ((MarkerAnnotation) o).getMarker();
							break;
						}
					}
				}
			}
			
			if (marker != null) {
				IWorkbenchPage page= getSite().getPage();
				IViewPart view= view= page.findView("org.eclipse.ui.views.TaskList"); 
				if (view instanceof TaskList) {
					StructuredSelection ss= new StructuredSelection(marker);
					((TaskList) view).setSelection(ss, true);
				}
			}
			
			selectAndReveal(errorPosition.getOffset(), errorPosition.getLength());
			setStatusLineErrorMessage(nextError.getMessage());
			
		} else {
			
			setStatusLineErrorMessage(null);
			
		}
	}
	
	/**
	 * Sets the given message as error message to this editor's status line.
	 * @param msg message to be set