Bug 312540 [LinkedResources] Copy resource in Navigator and Project Explorer always shows dialog
N20100511-2000. When copying an IFile from one to another folder in the Navigator or Project Explorer, I always get the dialog no matter how I've set the preferences on the 'Linked Resources' page (even if I disable linked resources).
bundles/org.eclipse.ui.navigator.resources/src/org/eclipse/ui/navigator/resources/ResourceDropAdapterAssistant.java
shouldLinkAutomatically = true;
			for (int i = 0; i < sources.length; i++) {
				if (sources[i].isVirtual() || sources[i].isLinked()) {
					shouldLinkAutomatically = false;
					break;
				}
			}
		}
		if (shouldLinkAutomatically) {
			CopyFilesAndFoldersOperation operation = new CopyFilesAndFoldersOperation(getShell());
			operation.setCreateLinks(true);
			operation.copyResources(sources, target);
		} else {
			ReadOnlyStateChecker checker = new ReadOnlyStateChecker(getShell(),
					WorkbenchNavigatorMessages.MoveResourceAction_title,
					WorkbenchNavigatorMessages.MoveResourceAction_checkMoveMessage);
			sources = checker.checkReadOnlyResources(sources);
			try {
				RefactoringContribution contribution = RefactoringCore
						.getRefactoringContribution(MoveResourcesDescriptor.ID);
				MoveResourcesDescriptor descriptor = (MoveResourcesDescriptor) contribution.createDescriptor();
				descriptor.setResourcesToMove(sources);
				descriptor.setDestination(target);
				refactoringStatus = new RefactoringStatus();
				final Refactoring refactoring = descriptor.createRefactoring(refactoringStatus);
				
				returnStatus = null;
				IRunnableWithProgress checkOp = new IRunnableWithProgress() {
					public void run(IProgressMonitor monitor) {
						try {