I AM ALPHA

Paste in your module markup (all of it, including the DOCTYPE), and click "Check It". That'll fire off the W3C Validator, and also make sure that you've got the classes we need for a module (among other gotchas).

A couple notes:

• If you're validating a server-side module, you won't pass the w3c's validator. Why? Because it doesn't understand XML Namespaces. Don't worry about it.
• It's more important that your module be well-formed (meaning it's valid XML) than valid. We like validity, in fact, we recommend it, but if you can't be valid, and least be well-formed.