[Plugin: Custom Metadata Manager] Plugin does not activate on "New post" page

The Custom Metadata Manager does not activate when you are creating a new post, only when you edit an existing one. It seems this is because the $_pages_whitelist array doesn’t contain post-new.php, which is the $pagenow value when creating a new post.

I tried this in my code, and it doesn’t seem to have bad side-effects. Is there any reason this was not included in the released plugin?

http://wordpress.org/extend/plugins/custom-metadata/