As an example, belledejouruk, the syndicated account for a rather popular weblog, Bell de Jour: Diary of a London Call Girl, used to contain just the links to new entries as they appeared; now it has full text of the entries.
The Volokh Conspiracy is an influential collaborative political/current-affairs weblog with emphasis on law. volokh remains a "headline feed", with titles and links only. However, volokh_full now carries the full text feed of the Conspiracy.
There're probably other examples of full-text feeds which didn't work before, but should be working now.