Autoloading with namespaces in 5.3.0

Hey, I'm looking to start playing with 5.3.0, and thus by extension, namespaces. One of the things that I definitely need support for is autoloading, and the docs aren't exactly explicit in some (obvious to me) cases. I have an autoloading class that internally handles file-not-found errors and the like and a set of methods that get registered via spl_autoload_register. I'm wondering if there's any way that the autoloader - which won't exist inside a namespace - can handle classes with the same name in several different namespaces. Say, for example, I have three directories foo/, bar/, and baz/ and each of those corresponds to a same-named namespace, and each also has a class named ExampleClass. If I try to instantate a foo\ExampleClass, does the classname get set in the autoloader method as "ExampleClass" or "foo\ExampleClass"? If the former, is there any way to determine the namespace name so I don't accidentally autoload bar\ExampleClass or baz\ExampleClass?