Bug 131000 [EFS] Drag and Drop of Folder with Spaces produces two folders in Navigator View (and other views that deal with resources)
If you grab a folder on the file system that has spaces in the name and drag it into a project in the navigator view, the folder is copied twice, once with escaped spaces (%20) and once without any escaped spaces. The folder with escaped spaces is the one with the content, the other folder has no content. This is a fairly serious bug for us because we use the CopyFilesAndFoldersOperation to do our own manipulation like this and the bug is in that class.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/wizards/datatransfer/FileStoreStructureProvider.java
* 
	 * @see org.eclipse.ui.wizards.datatransfer.IImportStructureProvider#getChildren(java.lang.Object)
	 */
	public List getChildren(Object element) {
		try {
			return Arrays.asList(((IFileStore) element).childStores(EFS.NONE,
					new NullProgressMonitor()));
		} catch (CoreException exception) {
			logException(exception);
			return new ArrayList();
		}
	}
	/**
	 * Log the exception.
	 * 
	 * @param exception
	 */
	private void logException(CoreException exception) {
		IDEWorkbenchPlugin.log(exception.getLocalizedMessage(), exception);
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.wizards.datatransfer.IImportStructureProvider#getContents(java.lang.Object)
	 */
	public InputStream getContents(Object element) {
		try {
			return ((IFileStore) element).openInputStream(EFS.NONE,
					new NullProgressMonitor());
		} catch (CoreException exception) {