If you visit Facebook's mobile site, you may notice a few changes to the way the Web site looks.

The social network began rolling out an update to the site that optimizes Facebook.com for all mobile phones, from the humble feature phone to the high-end smartphone.

Facebook previously encouraged feature phone owners to visit m.facebook.com, while channeling touch-screen devices to touch.facebook.com, but found the backend logistics limiting from a design standpoint and time-consuming for developers.

The upshot is that all of Facebook's mobile socialites will be able to see the latest updates regardless of their handset's smarts, thanks to a new UI framework that does a lot of the heavy crunching and compiling for the site's code jockeys.

Expect the gradual rollout to take a couple of weeks, Facebook said.

You can read more of the technical details on Facebook's site.