Drupal returns "You have to specify a valid date" on XML-RPC post

When trying to post to HEAD using an XML-RPC based blogging tool, the server returns "You have to specify a valid date".

Reason:
- node_validate() is called prior to the code which sets the default if the date is not supplied

Fix:
- perform validation after date check - specifically, just prior to node_submit()

The attached patch successfully fixes this problem, allowing posts to be successfully submitted from both Performancing for FF and w.Bloggar (latest of each).

Important Note:

Now that I'm successfully able to post, I'm seeing the following error in the log:

Invalid argument supplied for foreach() in C:\htdocs\drupal\modules\upload.module on line 432.

I believe this error was present before, but was shielded by the "valid date" error, but until this is validated by someone else, I'm not going to file it independently.

Thanks!