Bug 148551 [Import/Export] Import File System Problem
When going to import some files if you choose General, then Filesystem. As you browse to the folder where you want to import items from and select it, the option to "Select All" is not available until you either select the folder or a file in the folder.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/wizards/datatransfer/WizardFileSystemResourceImportPage1.java
}
        
		enableButtonGroup(true);
		setErrorMessage(null);
        return true;
    }
    /**
     * Returns whether the source location conflicts
     * with the destination resource. This will occur if
     * the source is already under the destination.
     * 
     * @param sourcePath the path to check
     * @return <code>true</code> if there is a conflict, <code>false</code> if not
     */
    protected boolean sourceConflictsWithDestination(IPath sourcePath) {
        IContainer container = getSpecifiedContainer();
        if (container == null) {
			return false;
		}
        
        IPath destinationLocation = getSpecifiedContainer().getLocation();
        if (destinationLocation != null) {
            return destinationLocation.isPrefixOf(sourcePath);
        }
         
         
        return false;
    }
}