This isn't a case of misuse of language becoming acceptable, as some of you have been suggesting. In actuality, 'entitle' was used before 'title' in the sense of 'to give a title to'. According to the Oxford English Dictionary, 'entitle' was first used in this sense in 1381, while 'title' was used in this sense in 1387. Both have long histories, and 'entitle' certainly has not become "acceptable misuse".

And as a matter of fact, you can say both, "Jane entitled a book..." and, "Jane has a book entitled...". In the first quote, Jane gave a book a title. In the second, Jane gave a book which has been given (previously, and perhaps not by Jane) a title. The difference is one of active vs. passive voice.