Bug 255172 [Import/Export] Warning message in the import wizard is not so helpful
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/wizards/datatransfer/WizardProjectsImportPage.java
if (path.equals(lastPath) && lastModified == modified) {
			
			
			return;
		}
		lastPath = path;
		lastModified = modified;
		
		
		final boolean dirSelected = this.projectFromDirectoryRadio
				.getSelection();
		try {
			getContainer().run(true, true, new IRunnableWithProgress() {
				/*
				 * (non-Javadoc)
				 * 
				 * @see
				 * org.eclipse.jface.operation.IRunnableWithProgress#run(org
				 * .eclipse.core.runtime.IProgressMonitor)
				 */
				public void run(IProgressMonitor monitor) {
					monitor
							.beginTask(
									DataTransferMessages.WizardProjectsImportPage_SearchingMessage,
									100);
					selectedProjects = new ProjectRecord[0];
					Collection files = new ArrayList();
					monitor.worked(10);
					if (!dirSelected
							&& ArchiveFileManipulations.isTarFile(path)) {