Warning for empty title

[orangenormal]

The default permalink structure includes the post title in the URI; this is also a very popular choice for those with custom permalink URIs. Unfortunately, sometimes posters forget to type a title for an entry, creating invalid URIs for the permalink, RSS feed, comment form, and other features. I submit that WordPress should either somehow alert the user if a post title is missing, or automatically generate one for the URIs.

[orangenormal]

To clarify the second suggestion--an automatically generated title should be used for the permalink structure only, so if the user doesn't want a title for their post, they can leave it blank (and not have it appear on their blog) but still have the URIs as valid.

[ryan]

The post id is now used for the post slug if no title is provided. Whether to issue warnings for a blank title and possibly other fields needs some UI debate.