Bug 57454 "show intro" preference not saved until shutdown
M8 As a general rule of thumb, if a plug-in changes a preference value then it should save it immediately. (or when the user hits OK/Apply in the prefs page, etc etc) When you start M8 and close the Intro page, I noticed that the ui.ide preferences are not saved until the workbench is shutdown.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/IDEWorkbenchAdvisor.java
String productName = null;
			AboutInfo about = IDEWorkbenchPlugin.getDefault().getPrimaryInfo();
			if (about != null) {
				productName = about.getProductName();
			}
			if (productName == null) {
				message = IDEWorkbenchMessages.getString("PromptOnExitDialog.message0"); 
			} else {
				message = IDEWorkbenchMessages.format("PromptOnExitDialog.message1", new Object[] { productName }); 
			}
			MessageDialogWithToggle dlg = MessageDialogWithToggle.openConfirm(
				windowConfigurer.getWindow().getShell(), 
				IDEWorkbenchMessages.getString("PromptOnExitDialog.shellTitle"), 
				message,
				IDEWorkbenchMessages.getString("PromptOnExitDialog.choice"), 
				false);
			if (dlg.getReturnCode() == Window.OK) {
				store.setValue(
					IDEInternalPreferences.EXIT_PROMPT_ON_CLOSE_LAST_WINDOW,
					!dlg.getToggleState());
				return true;
			} else {
				return false;
			}
		}
		return true;
	}
	
	
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