Both versions have the same features, but the desktop version comes with less furniture to ensure the installer isn't too big. You'll find the missing furniture groups at http://sourceforge.net/projects/sweetho ... 3D-models/ or at 3D models page.

By the way, as announced in the Sweet Home 3D Online Rules, a user document in the online shouldn't be larger than 3 MB, and you probably reached that limit. I know it would be nice to show a % counter of usage in the online version and hope to had this feature in a future version.