For anyone making Blu-ray compatible AVCHD discs with menus and playing them back on a PS3, you may have noticed that while the menu looked quite nice when it first came up, it wasn't possible to return to the menu once you started playing the titles.
Anyway, the brand new PS3 update, version 2.1, fixes this. This was one of the few remaining reasons why I still prefered an HD DVD player to a Blu-ray one for playback of my projects.
Kudos to Sony for fixing this.
About the only thing left to fix is to add the pop-up Blu-ray disc style menus to the AVCHD format.