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.ide/src/org/eclipse/ui/views/navigator/NavigatorDropAdapter.java
operation = new MoveFilesAndFoldersOperation(getShell());
                	if (operation.validateDestination(destination, selectedResources) != null) {
						operation.setVirtualFolders(true);
						message = operation.validateDestination(destination, selectedResources);
						if (message == null)
							lastValidOperation = DND.DROP_COPY;
					}
                }
            }
        } 
        else if (FileTransfer.getInstance().isSupportedType(transferType)) {
            String[] sourceNames = (String[]) FileTransfer.getInstance()
                    .nativeToJava(transferType);
            if (sourceNames == null) {
                
                
                sourceNames = new String[0];
            }
            CopyFilesAndFoldersOperation copyOperation = new CopyFilesAndFoldersOperation(
                    getShell());
            message = copyOperation.validateImportDestination(destination,
                    sourceNames);
        }
        if (message != null) {
            return error(message);
        }
        return ok();
    }
}